A5074052192- Magnetic properties of thin films
- Magnetic Properties and Applications
- Magnetic Properties of Alloys
- Magnetic and transport properties of perovskites and related materials
- Quantum Dots Synthesis And Properties
- Metallic Glasses and Amorphous Alloys
- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Shape Memory Alloy Transformations
- Magnetic Properties and Synthesis of Ferrites
- Copper-based nanomaterials and applications
- Theoretical and Computational Physics
- Advanced Condensed Matter Physics
- Chalcogenide Semiconductor Thin Films
University of Luxembourg
2013-2022
The antisymmetric Dzyaloshinskii--Moriya interaction (DMI) plays a decisive role for the stabilization and control of chirality skyrmion textures in various magnetic systems exhibiting noncentrosymmetric crystal structure. A less studied aspect DMI is that this believed to be operative vicinity lattice imperfections crystalline materials, due local structural inversion symmetry breaking. If scenario leads an effect sizable magnitude, it implies introduces into very large class...
Cu(In,Ga)Se2 (CIGSe) is a polycrystalline absorber layer in thin film solar cells with conversion efficiencies exceeding 20%. High temperature annealing for periods of minutes to hours currently required convert amorphous or nanocrystalline precursor material into high quality layers. In this work, we perform the critical step, using 1064 nm laser, on electrodeposited layers containing Cu, In, and Se, times 0.3–60 s thus synthesizing CuInSe2 An time 1 found be sufficient remove elemental...
Shell ferromagnetism is a new functional property of certain Heusler alloys which was recently observed in ${\mathrm{Ni}}_{50}{\mathrm{Mn}}_{45}{\mathrm{In}}_{5}$. We report the results comparative study magnetic microstructure bulk ${\mathrm{Ni}}_{50}{\mathrm{Mn}}_{45}{\mathrm{In}}_{5}$ using magnetometry, synchrotron x-ray diffraction, and small-angle neutron scattering (SANS). By combining unpolarized spin-polarized SANS (so-called POLARIS) we demonstrate that number important conclusions...
Single-step thermal chemical vapor deposition was optimized at 400 °C for the growth of CoFe2O4 spinel thin films starting from corresponding metal acetylacetonate precursors. Enhanced magnetization observed conditions leading to a columnar with preferred (100) orientation. The implemented liquid precursor delivery secured reliable films' composition control and straightforward dosage acetylacetone, as molecular inhibitor, enhance film conformality on structured surfaces. enabled an...
Small-angle scattering of X-rays and neutrons is a routine method for the determination nanoparticle sizes. The so-called Guinier law represents low-q approximation small-angle curve from an assembly particles. has originally been derived nonmagnetic particle-matrix-type systems it successfully employed estimation particle sizes in various scientific domains (e.g. soft-matter physics, biology, colloidal chemistry, materials science). An important prerequisite to apply presence discontinuous...
We report the results of an unpolarized small-angle neutron scattering (SANS) study on Mn-Bi-based rare-earth-free permanent magnets. The magnetic SANS cross section is dominated by long-wavelength transversal magnetization fluctuations, and has been analyzed in terms Guinier-Porod model distance distribution function. This provides radius gyration which, remanent state, ranges between about $220\ensuremath{-}240\phantom{\rule{0.16em}{0ex}}\mathrm{nm}$ for three different alloy compositions...
On the basis of Brown's static equations micromagnetics, uniaxial polarization scattered neutron beam a bulk magnetic material is computed. The approach considers Hamiltonian that takes into account isotropic exchange interaction, antisymmetric Dzyaloshinskii–Moriya anisotropy, dipole–dipole interaction and effect an applied field. In high-field limit, solutions for magnetization Fourier components are used to obtain closed-form results spin-polarized small-angle scattering (SANS) cross...