A5012950207- Rare-earth and actinide compounds
- Magnetic Properties of Alloys
- Magnetic and transport properties of perovskites and related materials
- Magnetic properties of thin films
- Physics of Superconductivity and Magnetism
- Magnetic Properties and Applications
- Advanced Condensed Matter Physics
- Iron-based superconductors research
- Hydrogen Storage and Materials
- Multiferroics and related materials
- High-pressure geophysics and materials
- Boron and Carbon Nanomaterials Research
- Inorganic Chemistry and Materials
- Shape Memory Alloy Transformations
- Metallurgical and Alloy Processes
- Theoretical and Computational Physics
- Metallic Glasses and Amorphous Alloys
- Heusler alloys: electronic and magnetic properties
- Microstructure and Mechanical Properties of Steels
- Intermetallics and Advanced Alloy Properties
- Inorganic Fluorides and Related Compounds
- Ferroelectric and Piezoelectric Materials
- Superconducting Materials and Applications
- Magneto-Optical Properties and Applications
- Magnetism in coordination complexes
TU Dresden
2016-2025
Leibniz Institute for Solid State and Materials Research
2005-2023
Polish Academy of Sciences
2020
Complexity and Topology in Quantum Matter
2020
Immanuel Kant Baltic Federal University
2018
Heinz Maier-Leibnitz Zentrum
2017
Technical University of Munich
2017
Moscow Institute of Physics and Technology
2015
Prokhorov General Physics Institute
2015
National High Magnetic Field Laboratory
2006
A very small capacitive sensor for measuring thermal expansion and magnetostriction of irregular shaped samples has been developed. method with tilted plates is used. The plate capacitance formula used the calculation capacitor gap, calibration performed by signal a standard material. active length sample can be less than 1 mm. absolute resolution about Å. All mechanical connections dilatometer are carried out tiny Cu–Be springs, enabling force on to adjusted (50–500 mN) no additional fixing...
We report on a new high resolution apparatus for measuring magnetostriction suitable use at cryogenic temperatures in pulsed magnetic fields which we have developed the Hochfeld-Magnetlabor Dresden. Optical fibre strain gauges based Fibre Bragg Gratings are used to measure small (~1mm) samples. describe implementation of fast measurement system capable resolving strains order $10^{-7}$ with full bandwidth 47kHz, and demonstrate its single crystal samples GdSb GdSi.
Centrosymmetric compounds which host three-dimensional topological spin structures comprise a distinct subclass of materials in multiple-<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi mathvariant="bold">q</a:mi></a:mrow></a:math> magnetic order is stabilized by anisotropy and bond frustration contrast to the more common path antisymmetric exchange interactions. Here we investigate static dynamic properties cubic perovskite <d:math...
The formation, phase relations, crystal chemistry and physical properties were investigated for the solid solution deriving from binary clathrate with a solubility limit of 8 Zn atoms per formula unit at 800 °C ( is vacancy). Single-crystal x-ray data throughout homogeneity region confirm type I structure cubic primitive space group .
Specific heat, resistivity, magnetic susceptibility, linear thermal expansion (LTE), and high-resolution synchrotron x-ray powder diffraction investigations of single crystals Fe${}_{1+y}$Te (0.06 $\ensuremath{\le}y\ensuremath{\le}$ 0.15) reveal a splitting single, first-order transition for $y\ensuremath{\le}$ 0.11 into two transitions $y\ensuremath{\ge}$ 0.13. Most strikingly, all measurements on identical samples Fe${}_{1.13}$Te consistently indicate that, upon cooling, the at ${T}_{N}$...
Magnetostriction in systems with rare-earth elements is a very general topic of interest because it characterizes the electronic magnetism compounds as well interaction magnetic and lattice system. The magnetostrictive behaviour classical ferromagnets widely investigated. interpretation data based on domain dynamics, crystal field effects other magnetoelastic mechanisms, which are extremely difficult to separate. Therefore, last few years there has been great activity area magnetostriction...
Rare-earth (R)-iron alloys are a backbone of permanent magnets. Recent increase in price rare earths has pushed the industry to seek ways reduce R-content hard magnetic materials. For this reason strong magnets with ThMn
The intermetallic compound Eu$_5$In$_2$Sb$_6$, an antiferromagnetic material with nonsymmorphic crystalline structure, is investigated by magnetic, electronic transport and specific heat measurements. Being a Zintl phase, insulating behavior expected. Our thermodynamic magnetotransport measurements along different crystallographic directions strongly indicate polaron formation well above the magnetic ordering temperatures. Pronounced anisotropies of properties even temperature are observed...
The influence of the dipole interaction on magnetic anisotropy Gd compounds is investigated. Available data ferromagnets and antiferromagnets with different crystal structures are discussed complemented by new neutron scattering experiments ${\mathrm{GdCu}}_{2}\mathrm{In},$ ${\mathrm{GdAu}}_{2}{\mathrm{Si}}_{2},$ ${\mathrm{GdAu}}_{2},$ ${\mathrm{GdAg}}_{2}.$ If propagation vector structure known, orientation moments as caused can be predicted a straightforward numerical method for single...
The crystal-field and exchange parameters are determined for the single-crystalline hydride $\mathrm{ErF}{\mathrm{e}}_{11}\mathrm{TiH}$ compound by analyzing experimental magnetization curves obtained in magnetic fields of up to 60 T. By using calculated we succeeded modeling theoretical 200 \cyrchar\CYRT{} study detail transition from ferrimagnetic a ferromagnetic state applied field.
By examining the Ho2Fe14B case, we explored influence of substitution and absorption atoms on high-field behavior magnetization rare-earth (R)-Fe intermetallics. The value first critical field shows that inter-sublattice exchange interactions remain practically unchanged when takes place in R sublattice (replacement up to 50 % Ho by Nd). On contrary, hydrogen Ho1Nd1Fe14B maximum possible concentration 5.5 at./f.u. decreases strength R-Fe 30%. Remarkably, hydrogenation is stronger compound...
Spinon-magnon mixing was recently reported in botallackite ${\mathrm{Cu}}_{2}{(\mathrm{OH})}_{3}\mathrm{Br}$ with a uniaxially compressed triangular lattice of ${\mathrm{Cu}}^{2+}$ quantum spins [H. Zhang et al., Phys. Rev. Lett. 125, 037204 (2020)]. Its nitrate counterpart rouaite, ${\mathrm{Cu}}_{2}{(\mathrm{OH})}_{3}{\mathrm{NO}}_{3}$, has highly analogous structure and might be expected to exhibit similar physics. To lay foundation for research on this material, we clarify rouaite's...
We report on a field-induced change of the electronic band structure CeBiPt as evidenced by electrical-transport measurements in pulsed magnetic fields. Above ~25 T, charge-carrier concentration increases nearly 30% with concomitant disappearance Shubnikov-de Haas signal. These features are intimately related to Ce 4f electrons since for non-4f compound LaBiPt Fermi surface remains unaffected. Electronic band-structure calculations point 4f-polarization-induced Fermi-surface topology.
Measurements of macroscopic magnetic properties the isostructural compounds Tb2PdSi3 and Er2PdSi3 show an additional phase transition below ordering temperature. The behaviours two are similar interpreted as spin-glass-like transitions in literature.
Single crystals of a series hydrides Er2Fe14BHx (x ≤ 2.5) have been produced and studied in pulsed magnetic fields up to 60 T. The magnetization curve Er2Fe14B the easy direction [100] features stepwise anomaly at about 45 T, corresponding first-order phase transition. A similar jump is also present along [110], but higher field, ∼52 data parent hydrogen-charged with x = 0.25, 1.5, 2.5 were used deduce Er-Fe molecular field Hmol as function hydrogen content x. After moderate initial...
In ${\mathrm{Ho}}_{3}{\mathrm{Ru}}_{4}{\mathrm{Al}}_{12}$, the Ho atoms form a distorted kagome lattice. We performed magnetization, magnetic-susceptibility, specific-heat, and ultrasound measurements on single crystal. find that magnetic magnetoelastic properties of ${\mathrm{Ho}}_{3}{\mathrm{Ru}}_{4}{\mathrm{Al}}_{12}$ result from an interplay between geometric frustration crystal-electric-field (CEF) effects. The order antiferromagnetically at...
We report on measurements of the sound velocity and attenuation in a single crystal candidate quantum-spin-ice material ${\mathrm{Yb}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}$ as function temperature magnetic field. The acoustic modes couple to spins magnetoelastically and, hence, carry information about spin correlations that sheds light intricate phase diagram nature dynamics material. Particularly, we find pronounced thermal hysteresis data with concomitant peak specific heat indicating...
Yb- and Ce-based delafossites were recently identified as effective spin-1/2 antiferromagnets on the triangular lattice. Several Yb-based systems, such NaYbO2, NaYbS2, NaYbSe2, exhibit no long-range order down to lowest measured temperatures therefore serve putative candidates for realization of a quantum spin liquid. However, their isostructural counterpart KCeS2 exhibits magnetic below TN = 400 mK, which was so far only in thermodynamic measurements. Here we reveal structure this ordered...
In the present work a model within mean-field theory is developed in order to analyze specific heat of magnetically ordered systems. This allows draw conclusions about type magnetic structure from near transition. The known description collinear amplitude-modulated and equal-moment magnetism has been extended account for noncollinear (NCAM) antiferromagnetic by introducing an anisotropic exchange interaction. Experimental evidence NCAM expected measurements specific-heat anomaly at ordering...