Roman Gröger
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Mechanism of magnetization reversal in bulk and nanoparticles of magnetite Open
The process by which magnetic moments switch directions is crucial for understanding the performance of magnetic storage materials and in biomedical applications such as magnetic particle imaging and magnetic hyperthermia. Here, we utilize…
Screw dislocation dipoles in niobium: combination of STM observations and atomistic simulations Open
We recently developed an experimental device that allows us to observe the slip traces under stress at the atomic scale. Here, we report experimental results obtained at the latter scale on Nb single crystals making it possible to observe …
From Core–Shell FeO/Fe<sub>3</sub>O<sub>4</sub> to Magnetite Nanocubes: Enhancing Magnetic Hyperthermia and Imaging Performance by Thermal Annealing Open
Wereport the synthesis of mostly magnetite nanocubes (NCs) inthe size range of 16-23 nm starting from FeO/Fe3O4 core-shell NCs and employing a thermal decompositionmethod, followed by thermal treatment. To induce the phase transformation,t…
View article: Cores of 1/2< 110 >-type dislocations in the CrMnFeCoNi high-entropy alloy investigated by STEM, the center of symmetry and the Nye tensor mapping techniques
Cores of 1/2< 110 >-type dislocations in the CrMnFeCoNi high-entropy alloy investigated by STEM, the center of symmetry and the Nye tensor mapping techniques Open
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Defect structures in (001) zincblende GaN/3C-SiC nucleation layers Open
The defect structure of zincblende GaN nucleation layers grown by metalorganic vapor-phase epitaxy on 3C-SiC/Si (001) was investigated by high-resolution scanning transmission electron microscopy. Perfect dislocations, partial dislocations…
Structure, Morphology and Coarsening Behavior of MX (NbC) Nanoprecipitates in Fe-Ni-Cr Based Alloys Open
Journal Article Structure, Morphology and Coarsening Behavior of MX (NbC) Nanoprecipitates in Fe-Ni-Cr Based Alloys Get access Milan Heczko, Milan Heczko CEITEC, Institute of Physics of Materials, Czech Academy of Sciences, Brno, Czech Rep…
Publisher's Note: Mesoscale plastic texture in body-centered cubic metals under uniaxial load [Phys. Rev. Materials <b>1</b>, 063601 (2017)] Open
Received 23 February 2018DOI:https://doi.org/10.1103/PhysRevMaterials.2.029902©2018 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasPlasticityTechniquesPhase-field modelingCondensed Matter, Materials & Applied Physics
Mesoscale plastic texture in body-centered cubic metals under uniaxial load Open
We develop a minimal continuum dislocation dynamics model for slip in bcc metals that accounts explicitly for non-Schmid behavior of screw dislocations in these materials. The dislocation substructure is represented by a continuum distribu…
<span>STEM</span> optical sectioning for imaging screw dislocation core structures Open
The introduction of spherical‐aberration correctors in STEM has allowed an improvement in spatial resolution up to the sub‐angstrom scale also accompanied by a reduction of the depth of focus (due to the increase in probe convergence angle…