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Pokročilé nano a mikrotechnologie Pokročilé materiály Strukturní biologie Gen. a prot. rostlin. systémů Molekulární medicína Výzkum mozku a lidské mysli Molekulární vet. medicína

Víceškálové modelování a měření fyzikálních vlastností

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Research areas

  • Experimental studies of relationships between microstructure and physical properties of materials.
  • Quantum-mechanical studies of electronic, magnetic and optical properties of ordered and disordered media.
  • Atomistic studies of stress relaxations in heteroepitaxial films, on surfaces and at interfaces.
  • Mesoscopic models of self-organization and pattern formation in correlated microstructural domains.
  • Thermodynamic models for entropically stabilized ordered high-temperature alloys.
  • Linking atomistic studies of incipient plasticity with direct experimental measurements.
  • Calculations of minimum energy pathways and sampling of the density of states of large systems.
  • Computational studies of dislocation loops in irradiated materials.
  • Self-organized criticality and scale invariance in systems with long range interactions.
  • Electron microscopy of extended defects and its coupling with image simulations of HREM contrast.
  • Computational fracture mechanics and fatigue of metals and polymers.
  • Experimental measurements of physical properties of metals and polymer-metal composites.
  • Modelling of phase diagrams of nanoalloys with complex metallic phases.

Main objectives

Bridging the description of structure-property relationships across many length and time scales

Physical properties of materials often change drastically when the surface to volume ratio of the material increases beyond certain limits. This leads to many interesting phenomena not observable in bulk materials, such as dislocation starvation in deformed nanopillars, strong surface reconstructions around screw dislocations in epitaxial films or free-standing foils, enhanced mobility of prismatic dislocation loops in irradiated materials and the associated need for corrections to the defect density when studied in TEM, existence of two-dimensional electron gas in III-V films grown heteroepitaxially on lattice-mismatched substrates and the onset of polarization through the foil, and the like. Our objective is to unravel the mechanisms that are responsible for these phenomena and develop models that can predict the behavior of the material across a wide range of length and time scales with a limited input from experimental measurements and quantum mechanical calculations.

Continuum-level predictions of structural stability and resistance to fracture and fatigue

Understanding the mechanisms leading to unstable crack growth and predicting the residual lifetime under current environmental conditions is a crucial step within computer aided materials design. Our aim is to develop accurate finite element models that include the salient physics of the problem and use these models to assess the stability of a wide range of structural components made of metals (both anisotropic single crystals and random polycrystals), polymers, polymer-polymer and polymer-metal composites. The obtained distribution of internal stresses will serve as a guideline to the optimized design of these components under given working conditions.

Experimental studies of functional properties of nanostructures

The objective is to elucidate how the heat and mechanical treatments affect the crystal structure, electrical and magnetic properties of micro and nanostructures. Most of these results are obtained by employing Mössbauer spectroscopy and the PPMS system. Our advanced measurements and optimizations of the functional properties of nanostructures for nanoelectronics, nanophotonics and (bio)sensing, and their correlations with structural and physical parameters of nanostructures suggest novel nanostructured materials with unique properties not observable in conventional materials.

Content of research

Elucidation of the mechanism of strain relief in large-misfit heterostructures

Large-misfit heterostructures are used to fabricate modern optoelectronic devices such as light emitting diodes (LED), laser diodes (LD) and high electron mobility transistors (HEMT). The main open question is the origin of the large density of threading dislocations and the understanding why these defects are not deleterious to the optical properties of the device as compared to GaAs-based devices, where even a modest density of threading dislocations completely quenches the luminescence of LEDs and LDs. We are mostly interested in understanding the origin of threading dislocations in AlN/Si heterostructures fabricated by atomic layer deposition (ALD) and molecular beam epitaxy (MBE) techniques and investigated using a combination of state-of-the-art atomistics calculations and transmission electron microscopy (TEM). An important part of this research will be the development of a new description of bonding in the Al-N-Si system by a combination of Tersoff potential, electrostatic interaction and self-consistently calculated distribution of Madelung effective charges on individual ions using the QEq method.

Development of multiscale models of plasticity based on atomic-level studies of dislocations

Molecular statics simulations are used to determine the core structures of screw dislocations and their changes in the vicinity of surfaces, interfaces, other lattice defects and under externally applied load. These details are implemented into constitutive laws which form the basis of the thermodynamic description of plasticity. The main application of this theory is a wide range of materials whose plastic flow is not governed by the Schmid law (bcc metals, hcp metals deforming by non-basal slip, intermetallics and certain nuclear materials). This theoretical description will be implemented into the finite element code ANSYS and used to investigate which atomic-level features associated with isolated dislocations are retained after coarse-graining and after Taylor averaging over all grain orientations. In parallel with these theoretical developments, we have recently initiated an experimental program whose objective is to elucidate the anomalous slip in single crystals of all non-magnetic bcc metals (V, Nb, Mo, Ta, W). These experiments will be made on millimeter-sized samples at 77 and 300 K and will map the response of each materials under tension and compression for all orientations throughout the standard stereographic triangle.

Understanding the phase stability, diffusion and plasticity of high-entropy alloys

It has been proposed that quaternary and higher order solid solution alloys can be stabilized as single phases due to a large configurational entropy that arises from equiatomic mixing of four or more chemical elements. While the individual pure components have typically very different crystal structures and ordering of magnetic moments, their mixture is a random alloy, typically with face centered or body centered cubic crystal structure, and no detectable magnetic moment. Our research effort focuses on following open questions:

Does the configurational entropy of these materials overcome the destabilizing effect of the enthalpy terms and thus stabilize the fcc or bcc crystal structure even though this is not the ground state for many of the constituent materials? Do the resulting solid solutions exhibit sufficient thermodynamic stabilities during subsequent thermal and mechanical exposures? Or, the system decomposes into a phase mixture with sufficiently long aging time?

Is the kinetics of diffusion in the corresponding crystal lattices influenced by the complex composition with consequences for high temperature plasticity of the alloys governed by diffusion-controlled processes?

How can we rationalize the deformation resistance of these alloys at low temperatures in terms of a dislocation core structure and energy barriers related to dislocation displacements?

The motion of dislocations in these materials will be described by a simplified thermodynamic model of dislocation glide that takes into account the randomness of the environment in which the dislocations move. The core structures, stability, activation barriers and kinetics of dislocations will be studied using molecular statics combined with the saddle-point search algorithms, which will serve to interpret the observations made using electron microscopy.

Sub-angström imaging of lattice defects by a combination of atomistic simulations and HREM

The point-wise resolution of the best aberration-corrected HREM is around 0.5 Å, which is still insufficient to identify the structures of dislocation cores in most technologically important materials such as Ta or W, where the largest displacement of core atoms is around 0.1 Å. The objective of this research is to combine the simulations of image contrast based on atomistically calculated structures of a few selected defects with direct HREM observations to develop additional “software aberration correctors” which will further narrow peak broadenings obtained from HREM. These additional corrections will allow direct imaging of unknown structures of lattice defects and their modifications due to surfaces and interfaces with other materials. These developments will open the possibility to understand how large epitaxial strain in III-nitride/Si heterostructures affect the core structure and mobility of mixed and threading dislocations and thus to boosting the optoelectronic properties of devices utilizing these materials.

Finite element characterization of the strength of polymer-polymer and polymer-metal composites

The steadily increasing interest in replacing metallic parts by more lightweight polymers and polymer-metal composites raises a number of questions about structural stability under slow crack growth. The main goal of this project is to develop methodology that would be capable of predicting the onset of slow crack propagation in polymers under a wide range of loading conditions, temperatures and also taking into account residual stresses. The residual lifetime of the structure will be obtained by considering a quasi-brittle behavior of these materials and quantifying the fracture mechanics parameters for a range of crack geometries and combinations of materials parameters. This large knowledge base and the predictions made from it will be used to find correlations between experimental data and predictions of the numerical model and thus to find the optimal combinations of materials parameters that guarantee structural stability under given working conditions. The obtained results will estimate the effect of residual stresses, variations of materials properties, understanding the roles of materials nonhomogenities and ambient conditions on the residual lifetime of these polymers.

Advanced measurements of the functional properties of nanostructures

The main goal is to find a correlation between the properties and the geometrical and structural parameters of nanostructures and to use this knowledge for feedback in the technology of their preparation and for various applications. Magnetic properties and electrical/thermal transport properties of nanostructures, ordered nanostructures, ultrathin layered structures, and high-temperature super-conductors will be determined experimentally in the temperature range of 2-300 K on a Physical Property Measuring System (PPMS, Quantum Design), which enables measurements in applied magnetic fields up to 9 T. A vibrating sample magnetometer (VSM) will be used to investigate magnetic properties at high temperatures (293-1093 K). Structural and magnetic properties of Fe-based nanostructures will be studied using Mössbauer spectroscopy at low (5-293 K) and high (293-1093 K) temperatures.

Theoretical predictions of phase diagrams of nanoalloys

Unlike in the case of bulk systems, surface stresses play an important role in determination of phase diagrams of nanoalloys. In these materials, the contribution of surface stress to the overall Gibbsfree energy ceases to be negligible and affects the melting temperatures of the constituents as well as the change of temperature of invariant thermodynamic reactions. The aims are to model phase diagrams of nanoalloys with variable particle sizes and to develop suitable models that properly describe the effects of surface stresses of the constituent elements and their intermetallics on the phase diagrams. These predictions are checked against available experimental data. 

seznam / vizitky

Jméno a pozice

E-mail

Telefon

prof. RNDr. Antonín Dlouhý, CSc.
Senior researcher
Ing. Oldřich Schneeweiss, DrSc.
Senior researcher
RNDr. Miroslav Hapla
Technický pracovník
Ing. Yvonna Jirásková, Ph.D.
Senior researcher
Ing. Tomáš Káňa, Ph.D.
Výzkumný pracovník - postdoc
Mgr. Andriy Ostapovets, Ph.D.
Výzkumný pracovník - postdoc
RNDr. Tomáš Žák, CSc.
Senior Researcher
doc. Ing. Pavel Hutař, Ph.D.
Zástupce vedoucího výzkumné skupiny
doc. Ing. Luboš Náhlík, Ph.D.
Ředitel organizační jednotky CEITEC IPM
Ing. Pavel Pokorný
Ph.D. Student
Mgr. Tomáš Záležák, Ph.D.
Výzkumný pracovník - postdoc
Mgr. Jan Fikar, Ph.D.
Vědecký pracovník
Ing. Kateřina Štegnerová
Ph.D. Student
Ing. Jan Poduška
Ph.D. Student
Bc. Vladimír Netopil
Student
doc. Hassan Elhadidy, Ph.D.
Vědecký pracovník
doc. Ing. Roman Gröger, Ph.D.
Vedoucí výzkumné skupiny
+420532290448

VYBRANÉ PUBLIKACE

2017

  • HASSAN, AF; ELHADIDY, H; ABDEL-MOHSEN, AM, 2017:Adsorption and photocatalytic detoxification of diazinon using iron and nanotitania modified activated carbons. JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS 75 , p. 299 - 306.

2016

  • ABDEL-MOHSEN, AM; JANCAR, J; MASSOUD, D; FOHLEROVA, Z; ELHADIDY, H; SPOTZ, Z; HEBEISH, A, 2016:Novel chitin/chitosan-glucan wound dressing: Isolation, characterization, antibacterial activity and wound healing properties. INTERNATIONAL JOURNAL OF PHARMACEUTICS 510 (1), p. 86 - 99.
  • COSOVIC, AR; ZAK, T; GLISIC, SB; SOKIC, MD; LAZAREVIC, SS; COSOVIC, VR; ORLOVIC, AM, 2016:Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol. JOURNAL OF SUPERCRITICAL FLUIDS 113 , p. 96 - 105.
  • GROGER, R; MARCHAND, B; LOOKMAN, T, 2016:Dislocations via incompatibilities in phase-field models of microstructure evolution. PHYSICAL REVIEW B 94 (5)
  • KANA, T; HUGER, E; LEGUT, D; CAK, M; SOB, M, 2016:Magnetism and deformation of epitaxial Pd and Rh thin films. PHYSICAL REVIEW B 93 (13)
  • LUNACEK, J; ZIVOTSKY, O; JIRASKOVA, Y; BURSIK, J; JANOS, P, 2016:Thermally stimulated iron oxide transformations and magnetic behaviour of cerium dioxide/iron oxide reactive sorbents. MATERIALS CHARACTERIZATION 120 , p. 295 - 303.
  • NAHLIK, L; STEGNEROVA, K; MASA, B; HUTAR, P, 2016:A failure scenario of ceramic laminates with strong interfaces. ENGINEERING FRACTURE MECHANICS 167 , p. 56 - 67.
  • PODUSKA, J; HUTAR, P; KUCERA, J; FRANK, A; SADILEK, J; PINTER, G; NAHLIK, L, 2016:Residual stress in polyethylene pipes. POLYMER TESTING 54 , p. 288 - 295.
  • POKORNY, P; HUTAR, P; NAHLIK, L, 2016:Residual fatigue lifetime estimation of railway axles for various loading spectra. THEORETICAL AND APPLIED FRACTURE MECHANICS 82 , p. 25 - 32.
  • VASIC, MM; ROUPCOVA, P; PIZUROVA, N; STEVANOVIC, S; BLAGOJEVIC, VA; ZAK, T; MINIC, DM, 2016:Thermally Induced Structural Transformations of Fe40Ni40P14B6 Amorphous Alloy. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 47A (1), p. 260 - 267.
  • ZIVOTSKY, O; TITOV, A; JIRASKOVA, Y; BURSIK, J; HENDRYCH, A; HRABOVSKA, K; TSEPELEV, VS, 2016:Surface and bulk magnetic anisotropy in bilayered CoSiB/FeNbCuSiB and FeNbSiB/FeSiB ribbons. JOURNAL OF ALLOYS AND COMPOUNDS 681 , p. 402 - 411.

2015

  • CIZEK, J; LUKAC, F; PROCHAZKA, I; VLCEK, M; JIRASKOVA, Y; SVEC, P; JANICKOVIC, D, 2015:Positive effect of hydrogen-induced vacancies on mechanical alloying of Fe and Al. JOURNAL OF ALLOYS AND COMPOUNDS 629 , p. 22 - 26.
  • ELHADIDY, H; GRILL, R; FRANC, J; SIK, O; MORAVEC, P; SCHNEEWEISS, O, 2015:Ion electromigration in CdTe Schottky metal-semiconductor-metal structure. SOLID STATE IONICS 278 , p. 20 - 25.
  • FIKAR, J; GROGER, R, 2015:Interactions of prismatic dislocation loops with free surfaces in thin foils of body-centered cubic iron. ACTA MATERIALIA 99 , p. 392 - 401.
  • GROGER, R; LECONTE, L; OSTAPOVETS, A, 2015:Structure and stability of threading edge and screw dislocations in bulk GaN. COMPUTATIONAL MATERIALS SCIENCE 99 , p. 195 - 202.
  • GROGER, R; VITEK, V, 2015:Determination of positions and curved transition pathways of screw dislocations in BCC crystals from atomic displacements. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 643 , p. 203 - 210.
  • HERZ, A; FRIAK, M; ROSSBERG, D; HENTSCHEL, M; THESKA, F; WANG, D; HOLEC, D; SOB, M; SCHNEEWEISS, O; SCHAAF, P, 2015:Facet-controlled phase separation in supersaturated Au-Ni nanoparticles upon shape equilibration. APPLIED PHYSICS LETTERS 107 (7)
  • JANDACKA, P; KASPAROVA, B; JIRASKOVA, Y; DEDKOVA, K; MAMULOVA-KUTLAKOVA, K; KUKUTSCHOVA, J, 2015:Iron-based granules in body of bumblebees. BIOMETALS 28 (1), p. 89 - 99.
  • JIRASKOVA, Y; BURSIK, J; HAPLA, M; TUREK, I, 2015:Influence of Molybdenum on the Alloying and Physical Properties of Fe-Al. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM 28 (3), p. 905 - 910.
  • KROUPA, A.; KÁŇA, T.; BURŠÍK, J.; ZEMANOVÁ, A.; ŠOB, M., 2015:Modelling of phase diagrams of nanoalloys with complex metallic phases: application to Ni-Sn. PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17 (42), p. 28200 - 28210.
  • PARSA, AB; WOLLGRAMM, P; BUCK, H; KOSTKA, A; SOMSEN, C; DLOUHY, A; EGGELER, G, 2015:Ledges and grooves at gamma/gamma ' interfaces of single crystal superalloys. ACTA MATERIALIA 90 , p. 105 - 117.
  • PARSA, AB; WOLLGRAMM, P; BUCK, H; SOMSEN, C; KOSTKA, A; POVSTUGAR, I; CHOI, PP; RAABE, D; DLOUHY, A; MULLER, J; SPIECKER, E; DEMTRODER, K; SCHREUER, J; NEUKING, K; EGGELER, G, 2015:Advanced Scale Bridging Microstructure Analysis of Single Crystal Ni-Base Superalloys. ADVANCED ENGINEERING MATERIALS 17 (2), p. 216 - 230.

2014

  • BLAGOJEVIC, VA; VASIC, M; DAVID, B; MINIC, DM; PIZUROVA, N; ZAK, T; MINIC, DM, 2014:Microstructure and functional properties of Fe73.5Cu1Nb3Si15.5B7 amorphous alloy. MATERIALS CHEMISTRY AND PHYSICS 145 (42036), p. 12 - 17.
  • BLAGOJEVIC, VA; VASIC, M; DAVID, B; MINIC, DM; PIZUROVA, N; ZAK, T; MINIC, DM, 2014:Thermally induced crystallization of Fe73.5Cu1Nb3Si15.5B7 amorphous alloy. INTERMETALLICS 45 , p. 53 - 59.
  • DAVID, B; PIZUROVA, N; SYNEK, P; KUDRLE, V; JASEK, O; SCHNEEWEISS, O, 2014:epsilon-Fe2O3 nanoparticles synthesized in atmospheric-pressure microwave torch. MATERIALS LETTERS 116 , p. 370 - 373.
  • DAVID, B; SCHNEEWEISS, O; PIZUROVA, N; REK, A; KUDRLE, V; JASEK, O, 2014:Nanocrystalline alpha-Fe Layer Examined by Mossbauer Spectrometry. ACTA PHYSICA POLONICA A 126 (1), p. 94 - 95.
  • ELHADIDY, H; DEDIC, V; FRANC, J; GRILL, R, 2014:Study of polarization phenomena in n-type CdZnTe. JOURNAL OF PHYSICS D-APPLIED PHYSICS 47 (5)
  • GROGER, R, 2014:Which stresses affect the glide of screw dislocations in bcc metals?. PHILOSOPHICAL MAGAZINE 94 (18), p. 2021 - 2030.
  • HASSAN, AF; ABDEL-MOHSEN, AM; ELHADIDY, H, 2014:Adsorption of arsenic by activated carbon, calcium alginate and their composite beads. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 68 , p. 125 - 130.
  • HASSAN, AF; ABDELGHNY, AM; ELHADIDY, H; YOUSSEF, AM, 2014:Synthesis and characterization of high surface area nanosilica from rice husk ash by surfactant-free sol-gel method. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 69 (3), p. 465 - 472.
  • HENDRYCH, A; ZIVOTSKY, O; JIRASKOVA, Y; MATKO, I, 2014:The Surface and Bulk Magnetic Properties of Fe-Al Alloys. ACTA PHYSICA POLONICA A 126 (1), p. 58 - 59.
  • HUTAR, P; KUBENA, I; SEVCIK, M; SMID, M; KRUML, T; NAHLIK, L, 2014:Small fatigue crack propagation in Y2O3 strengthened steels. JOURNAL OF NUCLEAR MATERIALS 452 (42064), p. 370 - 377.
  • HUTAR, P; SEVCIK, M; NAHLIK, L; ZOUHAR, M; KNESL, Z, 2014:Assessment of the Stability of a Surface Crack in Laminates. MECHANICS OF COMPOSITE MATERIALS 50 (1), p. 9 - 16.
  • OSTAPOVETS, A; GROGER, R, 2014:Twinning disconnections and basal-prismatic twin boundary in magnesium. MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING 22 (2)
  • OSTAPOVETS, A; SERRA, A, 2014:Characterization of the matrix-twin interface of a (10(1)over-bar2) twin during growth. PHILOSOPHICAL MAGAZINE 94 (25), p. 2827 - 2839.
  • PODUSKA, J; KUCERA, J; HUTAR, P; SEVCIK, M; KRIVANEK, J; SADILEK, J; NAHLIK, L, 2014:Residual stress distribution in extruded polypropylene pipes. POLYMER TESTING 40 , p. 88 - 98.
  • SIDDHESWARAN, R; MEDLIN, R; BELSKY, P; VAVRUNKOVA, V; OCENASEK, J; DAVID, B; SUTTA, P, 2014:Heterogeneous phase formation in diluted magnetic semiconducting Zn1-x-yCoxAlyO (CAZO) nanoparticles. RSC ADVANCES 4 (45), p. 23405 - 23411.
  • ZAK, T; DAVID, B; COSOVIC, A; COSOVIC, V; ZIVKOVIC, D; TALIJAN, N, 2014:Structure and Magnetic Properties of Nanocrystalline NiFe2O4 Prepared via Precipitation Route. ACTA PHYSICA POLONICA A 126 (1), p. 142 - 143.

2013

  • COSOVIC, A; COSOVIC, V; ZAK, T; DAVID, B; TALIJAN, N, 2013:STRUCTURE AND PROPERTIES OF NANOSIZE NiFe2O4 PREPARED BY TEMPLATE AND PRECIPITATION METHODS. JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY 49 (3), p. 271 - 277.
  • DEDIC, V; FRANC, J; ELHADIDY, H; GRILL, R; BELAS, E; MORAVEC, P; ZAZVORKA, J; HOSCHL, P, 2013:Study of deep levels in high resistivity CdZnTe by discharge current measurement. JOURNAL OF INSTRUMENTATION 8
  • ELHADIDY, H; ABDELHAMID, MI; ABOELWAFA, AM; HABIB, A, 2013:Structure and Piezoelectricity of Poly (styrene-co-acrylonitrile) Copolymer Doped with Different Dyes. POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING 52 (12), p. 1277 - 1284.
  • GROGER, R; VITEK, V, 2013:Stress dependence of the Peierls barrier of 1/2 < 111 > screw dislocations in bcc metals. ACTA MATERIALIA 61 (17), p. 6362 - 6371.
  • HUTAR, P; SEVCIK, M; FRANK, A; NAHLIK, L; KUCERA, J; PINTER, G, 2013:The effect of residual stress on polymer pipe lifetime. ENGINEERING FRACTURE MECHANICS 108 , p. 98 - 108.
  • HUTAR, P; ZOUHAR, M; NAHLIK, L; SEVCIK, M; MASA, B, 2013:Multilayer polymer pipes failure assessment based on a fracture mechanics approach. ENGINEERING FAILURE ANALYSIS 33 , p. 151 - 162.
  • JIRASKOVA, Y; BURSIK, J; CIZEK, J; JANCIK, D, 2013:Solid-state reactions during mechanical milling of Fe-Al under nitrogen atmosphere. JOURNAL OF ALLOYS AND COMPOUNDS 568 , p. 106 - 111.
  • JIRASKOVA, Y; BURSIK, J; TUREK, I, 2013:Nanostructure, Composition, and Magnetic Behavior of Mechanically Alloyed Fe-Mo. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM 26 (5), p. 1717 - 1721.
  • JIRASKOVA, Y; HENDRYCH, A; ZIVOTSKY, O; BURSIK, J; ZAK, T; PROCHAZKA, I; JANICKOVIC, D, 2013:Surface magneto-optical and Mossbauer observations of Fe-Al. APPLIED SURFACE SCIENCE 276 , p. 68 - 75.
  • NEZBEDOVA, E; HUTAR, P; ZOUHAR, M; KNESL, Z; SADILEK, J; NAHLIK, L, 2013:The applicability of the Pennsylvania Notch Test for a new generation of PE pipe grades. POLYMER TESTING 32 (1), p. 106 - 114.
  • OSTAPOVETS, A; MOLNAR, P, 2013:On the relationship between the "shuffling-dominated" and "shear-dominated" mechanisms for {10(1)over-bar2} twinning in magnesium. SCRIPTA MATERIALIA 69 (4), p. 287 - 290.
  • OSTAPOVETS, A; MOLNAR, P; JAGER, A, 2013:Visco-plastic self-consistent modelling of a grain boundary misorientation distribution after equal-channel angular pressing in an AZ31 magnesium alloy. JOURNAL OF MATERIALS SCIENCE 48 (5), p. 2123 - 2134.
  • SEVCIK, M; HUTAR, P; NAHLIK, L; SEITL, S, 2013:The effect of constraint level on a crack path. ENGINEERING FAILURE ANALYSIS 29 , p. 83 - 92.
  • SIK, O; GRMELA, L; ELHADIDY, H; DEDIC, V; SIKULA, J; GRMELA, P; FRANC, J; SKARVADA, P; HOLCMAN, V, 2013:Study of electric field distribution and low frequency noise of CdZnTe radiation detectors. JOURNAL OF INSTRUMENTATION 8
  • SRIVASTAVA, K; GROGER, R; WEYGAND, D; GUMBSCH, P, 2013:Dislocation motion in tungsten: Atomistic input to discrete dislocation simulations. INTERNATIONAL JOURNAL OF PLASTICITY 47 , p. 126 - 142.
  • ZIVOTSKY, O; TITOV, A; JIRASKOVA, Y; BURSIK, J; KALBACOVA, J; JANICKOVIC, D; SVEC, P, 2013:Full-scale magnetic, microstructural, and physical properties of bilayered CoSiB/FeSiB ribbons. JOURNAL OF ALLOYS AND COMPOUNDS 581 , p. 685 - 692.

2012

  • ABDELHAMID, MI; ABOELWAFA, AM; ELHADIDY, H; HABIB, A, 2012:Investigation of the Structure and Piezoelectricity of Poly(vinylidene fluoride-trifluroethylene) Copolymer Doped with Different Dyes. INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS 61 (7), p. 505 - 519.
  • CEKIC, BDJ; UMICEVIC, AB; IVANOVSKI, VN; HU, RW; PETROVIC, C; DAVID, B; BARUDZIJA, T, 2012:PERTURBED ANGULAR CORRELATION INVESTIGATION OF THE ELECTRIC FIELD GRADIENT AT Ta-181 PROBE IN THE Hf2Ni7 COMPOUND. NUCLEAR TECHNOLOGY & RADIATION PROTECTION 27 (2), p. 95 - 102.
  • CIZEK, J; LUKAC, F; PROCHAZKA, I; KUZEL, R; JIRASKOVA, Y; JANICKOVIC, D; ANWAND, W; BRAUER, G, 2012:Characterization of quenched-in vacancies in Fe-Al alloys. PHYSICA B-CONDENSED MATTER 407 (14), p. 2659 - 2664.
  • DAVID, B; PIZUROVA, N; SCHNEEWEISS, O; SANTAVA, E; KUDRLE, V; JASEK, O, 2012:gamma-Fe2O3 Nanopowders Synthesized in Microwave Plasma and Extraordinarily Strong Temperature Influence on Their Mossbauer Spectra. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 12 (12), p. 9277 - 9285.
  • DAVID, B; SCHNEEWEISS, O; SANTAVA, E; JASEK, O, 2012:Magnetic Properties of gamma-Fe2O3 Nanopowder Synthesized by Atmospheric Microwave Torch Discharge. ACTA PHYSICA POLONICA A 122 (1), p. 9 - 11.
  • ELHADIDY, H; SIKULA, J; FRANC, J, 2012:Symmetrical current-voltage characteristic of a metal-semiconductor-metal structure of Schottky contacts and parameter retrieval of a CdTe structure. SEMICONDUCTOR SCIENCE AND TECHNOLOGY 27 (1)
  • GRILL, R; FRANC, J; ELHADIDY, H; BELAS, E; UXA, S; BUGAR, M; MORAVEC, P; HOSCHL, P, 2012:Theory of Deep Level Spectroscopy in Semi-Insulating CdTe. IEEE TRANSACTIONS ON NUCLEAR SCIENCE 59 (5), p. 2383 - 2391.
  • GROGER, R; VITEK, V, 2012:Constrained nudged elastic band calculation of the Peierls barrier with atomic relaxations. MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING 20 (3)
  • KANA, T; SOB, M, 2012:Mechanical and magnetic properties of Mn-Pt compounds and nanocomposites. PHYSICAL REVIEW B 85 (21)
  • MINIC, DM; BLAGOJEVIC, VA; DAVID, B; PIZUROVA, N; ZAK, T; MINIC, DM, 2012:Influence of thermal treatment on microstructure of Fe75Ni2Si8B13C2 amorphous alloy. INTERMETALLICS 25 , p. 75 - 79.
  • MINIC, DM; BLAGOJEVIC, VA; MARICIC, AM; ZAK, T; MINIC, DM, 2012:Influence of structural transformations on functional properties of Fe75Ni2Si8B13C2 amorphous alloy. MATERIALS CHEMISTRY AND PHYSICS 134 (1), p. 111 - 115.
  • MINIC, DM; BLAGOJEVIC, VA; MINIC, DM; DAVID, B; PIZUROVA, N; ZAK, T, 2012:Nanocrystal Growth in Thermally Treated Fe75Ni2Si8B13C2 Amorphous Alloy. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 43A (9), p. 3062 - 3069.
  • NAHLIK, L; HUTAR, P; DUSKOVA, M; DUSEK, K; MASA, B, 2012:ESTIMATION OF THE MACROSCOPIC STRESS-STRAIN CURVE OF A PARTICULATE COMPOSITE WITH A CROSS-LINKED POLYMER MATRIX. MECHANICS OF COMPOSITE MATERIALS 47 (6), p. 627 - 634.
  • OSTAPOVETS, A; SEDA, P; JAGER, A; LEJCEK, P, 2012:New misorientation scheme for a visco-plastic self-consistent model: Equal channel angular pressing of magnesium single crystals. INTERNATIONAL JOURNAL OF PLASTICITY 29 , p. 1 - 12.
  • OSTAPOVETS, A; ZARUBOVA, N; PAIDAR, V, 2012:Topological Model of Austenite-Martensite Interfaces in Cu-Al-Ni Alloy. ACTA PHYSICA POLONICA A 122 (3), p. 493 - 496.
  • PAIDAR, V; OSTAPOVETS, A; DUPARC, OH; KHALFALLAH, O, 2012:Displacive Phase Transformations and Generalized Stacking Faults. ACTA PHYSICA POLONICA A 122 (3), p. 490 - 492.
  • SEDA, P; OSTAPOVETS, A; JAGER, A; LEJCEK, P, 2012:Texture evolution in oriented magnesium single crystals processed by equal channel angular pressing. PHILOSOPHICAL MAGAZINE 92 (10), p. 1223 - 1237.
  • SEVCIK, M; HUTAR, P; KNESL, Z; NAHLIK, L; ZOUHAR, M, 2012:Estimation of the critical configuration of a crack arrested at the interface between two materials. COMPUTATIONAL MATERIALS SCIENCE 64 , p. 225 - 228.
  • STAJCIC, AP; STAJIC-TROSIC, JT; GRUJIC, AS; STIJEPOVIC, MZ; LAZIC, NL; ZAK, T; ALEKSIC, RR, 2012:Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix. HEMIJSKA INDUSTRIJA 66 (3), p. 301 - 308.
  • ZAK, T; COSOVIC, V; COSOVIC, A; DAVID, B; TALIJAN, N; ZIVKOVIC, D, 2012:Formation of Magnetic Microstructure of the Nanosized NiFe2O4 Synthesized Via Solid-State Reaction. SCIENCE OF SINTERING 44 (1), p. 103 - 112.
  • ZIVOTSKY, O; HENDRYCH, A; KLIMSA, L; JIRASKOVA, Y; BURSIK, J; GOMEZ, JAM; JANICKOVIC, D, 2012:Surface microstructure and magnetic behavior in FeSiB amorphous ribbons from magneto-optical Kerr effect. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 324 (4), p. 569 - 577.
  • ZIVOTSKY, O; JIRASKOVA, Y; HENDRYCH, A; MATEJKA, V; KLIMSA, L; BURSIK, J, 2012:Influence of Annealing Temperature and Atmosphere on Surface Microstructure and Magnetism in FINEMET-Type FeSiNbCuB Ribbons. IEEE TRANSACTIONS ON MAGNETICS 48 (4), p. 1367 - 1370.

2011

  • BLAGOJEVIC, VA; MINIC, DM; ZAK, T; MINIC, DM, 2011:Influence of thermal treatment on structure and microhardness of Fe75Ni2Si8B13C2 amorphous alloy. INTERMETALLICS 19 (12), p. 1780 - 1785.
  • CEKIC, B; IVANOVSKI, V; ZAK, T; STOJIC, D; BELOSEVIC-CAVOR, J; KOTESKI, V; UMICEVIC, A, 2011:MOSSBAUER STUDY OF HfFe2 AND Hf0.75Ta0.25Fe2. ROMANIAN JOURNAL OF PHYSICS 56 (42160), p. 719 - 723.
  • DAVID, B; PIZUROVA, N; SCHNEEWEISS, O; KUDRLE, V; JASEK, O; SYNEK, P, 2011:Iron-Based Nanopowders Containing alpha-Fe, Fe3C, and gamma-Fe Particles Synthesised in Microwave Torch Plasma and Investigated with Mossbauer Spectroscopy. JAPANESE JOURNAL OF APPLIED PHYSICS 50 (8)
  • JAGER, A; OSTAPOVETS, A; MOLNAR, P; LEJCEK, P, 2011:{10(1)over-bar2}-{10(1)over-bar} Double twinning in magnesium. PHILOSOPHICAL MAGAZINE LETTERS 91 (8), p. 537 - 544.
  • JIRASKOVA, Y; BURSIK, J; TUCEK, J, 2011:Phase and Microstructural Analysis of Hot Rolled FeNi42 Sheet, its Response in Magnetic and Mechanical Properties. STEEL RESEARCH INTERNATIONAL 82 (8), p. 898 - 904.
  • MINIC, DM; BLAGOJEVIC, VA; MINIC, DM; GAVRILOVIC, A; RAFAILOVIC, L; ZAK, T, 2011:Influence of Microstructure on Microhardness of Fe81Si4B13C2 Amorphous Alloy after Thermal Treatment. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 42A (13), p. 4106 - 4112.
  • MINIC, DM; BLAGOJEVIC, VA; MINIC, DM; ZAK, T, 2011:Influence of microstructural inhomogeneity of individual sides of Fe81Si4B13C2 amorphous alloy ribbon on thermally induced structural transformations. MATERIALS CHEMISTRY AND PHYSICS 130 (3), p. 980 - 985.
  • OSTAPOVETS, A; PAIDAR, V, 2011:Evaluation of the Peierls stress for boundary dislocations. PHYSICS OF METALS AND METALLOGRAPHY 111 (3), p. 229 - 235.
  • OSTAPOVETS, A; SEDA, P; JAGER, A; LEJCEK, P, 2011:Characteristics of coincident site lattice grain boundaries developed during equal channel angular pressing of magnesium single crystals. SCRIPTA MATERIALIA 64 (5), p. 470 - 473.
  • RIETH, M; BOUTARD, JL; DUDAREV, SL; AHLGREN, T; ANTUSCH, S; BALUC, N; BARTHE, MF; BECQUART, CS; CIUPINSKI, L; CORREIA, JB; DOMAIN, C; FIKAR, J; FORTUNA, E; FU, CC; GAGANIDZE, E; GALAN, TL; GARCIA-ROSALES, C; GLUDOVATZ, B; GREUNER, H; HEINOLA, K; HOLSTEIN,, 2011:Review on the EFDA programme on tungsten materials technology and science. JOURNAL OF NUCLEAR MATERIALS 417 (42064), p. 463 - 467.
  • SCHNEEWEISS, O; FILIP, J; DAVID, B; ZBORIL, R; MASLAN, M, 2011:Iron nanoparticles prepared from natural ferrihydrite precursors: kinetics and properties. JOURNAL OF NANOPARTICLE RESEARCH 13 (11), p. 5677 - 5684.
  • SYNEK, P; JASEK, O; ZAJICKOVA, L; DAVID, B; KUDRLE, V; PIZUROVA, N, 2011:Plasmachemical synthesis of maghemite nanoparticles in atmospheric pressure microwave torch. MATERIALS LETTERS 65 (6), p. 982 - 984.

2010

  • BAKR, NA; ELHADIDY, H; HAMMAM, M; MIGAHED, MD, 2010:Refractive index, extinction coefficient and DC conductivity of amorphous arsenic triselenide thin film doped with silver (vol 424, pg 296, 2003). THIN SOLID FILMS 519 (1), p. 556 - 556.
  • DAVID, B; SCHNEEWEISS, O; PIZUROVA, N; DUMITRACHE, F; FLEACA, C; ALEXANDRESCU, R, 2010:Nanopowders with superparamagnetic Fe3C particles and their annealing behaviour. SURFACE AND INTERFACE ANALYSIS 42 (41826), p. 699 - 702.
  • DAVID, B; SCHNEEWEISS, O; SANTAVA, E; MORJAN, I, 2010:Low-Temperature Magnetic Properties of Nanocomposites Containing Superparamagnetic Fe3C Particles. ACTA PHYSICA POLONICA A 118 (5), p. 766 - 767.
  • GROGER, R; LOOKMAN, T; SAXENA, A, 2010:Incompatibility of strains and its application to mesoscopic studies of plasticity. PHYSICAL REVIEW B 82 (14)
  • JIRASKOVA, Y; ZABRANSKY, K; VUJTEK, M; ZIVOTSKY, O, 2010:Changes in the hyperfine interactions in the Fe80Nb3Cu1B16 metallic glass under tensile loading. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 322 (14), p. 1939 - 1946.
  • OSTAPOVETS, A, 2010:Atomistic model of type-II twin boundary. COMPUTATIONAL MATERIALS SCIENCE 49 (4), p. 882 - 887.
  • PAL'-VAL', PP; PAL'-VAL', LN; OSTAPOVETS, AA; VANEK, P, 2010:Effect of Cd content on the kinetics of low-temperature structural transformation in In-Cd alloy. LOW TEMPERATURE PHYSICS 36 (3), p. 272 - 278.
  • SCHNEEWEISS, O; DAVID, B; ZAK, T; FILIP, J; TUCEK, J; ZBORIL, R; MASLAN, M, 2010:Magnetic Interactions between Nanoparticles Formed during Calcination of Ferrihydrite. ACTA PHYSICA POLONICA A 118 (5), p. 749 - 750.
  • SMOLAKOVA, L; GRYGAR, T; CAPEK, L; SCHNEEWEISS, O; ZBORIL, R, 2010:Speciation of Fe in Fe-modified zeolite catalysts. JOURNAL OF ELECTROANALYTICAL CHEMISTRY 647 (1), p. 8 - 19.
  • ZABRANSKY, K; SCHNEEWEISS, O; PIZUROVA, N; DAVID, B, 2010:Properties of Ni3Fe Nanoparticles Prepared by Chemical Method. ACTA PHYSICA POLONICA A 118 (5), p. 785 - 786.
  • ZAK, T; TALIJAN, NM; COSOVIC, VR; STAJIC-TROSIC, JT; GRUJIC, AS, 2010:An overstoichiometric Nd-Fe-B hard magnetic material. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 75 (9), p. 1271 - 1277.
  • ZIVOTSKY, O; JIRASKOVA, Y; DE GRAVE, E; HRABOVSKA, K; HENDRYCH, A; KLIMSA, L, 2010:Influence of Si Content on the Surface Magnetic Properties of Fe80SixB20-x Metallic Glasses (x=6, 10). ACTA PHYSICA POLONICA A 118 (5), p. 751 - 753.
  • ZIVOTSKY, O; JIRASKOVA, Y; HRABOVSKA, K; PISTORA, J; DE RESENDE, VG, 2010:Surface Magnetic Properties and Mossbauer Spectroscopy of As-Quenched FeNiMoCuB Ribbons. IEEE TRANSACTIONS ON MAGNETICS 46 (2), p. 369 - 372.

GRANTY

  • Původ a mechanismus anomálního skluzu v nemagnetických bcc kovech (16-13797S), Czech Science Foundation - Standard Grants, 2016 - 2018
  • Talented postdocs for scientific excellence in physics of materials (CZ.1.07/2.3.00/30.0063), MEYS - OP Education for Competiteveness, 2012 - 2015
  • Effects of cores and boundaries of nanograins on structural and physical properties of ball milled and mechanically alloyed iron-based materials (GAP108/11/1350), Czech Science Foundation - Standard Grants, 2011 - 2014
  • Mesoscopic framework for modeling physical processes in multiphase materials with defects (MesoPhysDef) (247705), FP7- People - Marie Curie actions - IRG, 2009 - 2013
  • Popis šíření creepové trhliny v polymerních materiálech při komplexním mechanickém namáhání, Czech Science Foundation - Standard Grants, 2011 - 2014
  • Víceoborový výzkumný tým v oblasti designu materiálů a jeho zapojení do mezinárodní kooperace (CZ.1.07./2.3.00/20.0197), MEYS - OP Education for Competiteveness, 2012 - 2015
  • Budování a rozvoj vědecko-výzkumné spolupráce s výzkumnými a průmyslovými partnery (CZ.1.07/2.4.00/17.0006), MEYS - OP Education for Competiteveness, 2011 - 2014
  • Mikrostruktura slitin na bázi Fe-Al (7AMB12SK009), MEYS - Mobility, 2012 - 2013
  • Interakce prismatických dislokačních smyček v alfa železe a wolframu (16-24402S), Czech Science Foundation - Standard Grants, 2016 - 2018
  • Mechanismy plastické deformace a dvojčatová rozhraní v hexagonálních kovech (16-14599S), Czech Science Foundation - Standard Grants, 2016 - 2018
  • Human resources development in the research of physical and material properties of emerging, newly developed and applied engineering materials (CZ.1.07/2.3.00/20.0214), MEYS - OP Education for Competiteveness, 2012 - 2015

CURRENT RESEARCH INFRASTRUCTURE

  • PANalytical X’Pert Pro MPD X-ray diffractometer
  • Tescan LYRA 3 FEG/SEM/xFIB scanning electron microscope
  • JEOL JEM-2100F high-resolution transmission electron microscope (not aberration-corrected) with X-Max80 Oxford Instruments EDS detector for X-ray microanalysis
  • CCS-800 Janis Mössbauer spectrometer
  • VSM 7400 Lake Shore vibrating sample magnetometer
  • 9 T EC II Physical Property Measurement System (Quantum Design)
  • Remagraph-Remacomp C-710
  • High-temperature tubular ovens for thermal processing of materials (in inert gas, hydrogen or vacuum)
  • Equipment for spark plasma synthesis of nanopowders.
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