A5041974247- Magnetic Properties of Alloys
- Magnetic and transport properties of perovskites and related materials
- Photorefractive and Nonlinear Optics
- Shape Memory Alloy Transformations
- Magnetic Properties and Applications
- Carbon Nanotubes in Composites
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Magnetic properties of thin films
- Metallic Glasses and Amorphous Alloys
- Rare-earth and actinide compounds
- Nanotechnology research and applications
- Advanced Materials and Mechanics
- Advanced Sensor and Energy Harvesting Materials
- Microstructure and mechanical properties
- Microstructure and Mechanical Properties of Steels
- Solid State Laser Technologies
- Solidification and crystal growth phenomena
- Advanced Thermoelectric Materials and Devices
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
- Fullerene Chemistry and Applications
- Phase-change materials and chalcogenides
- Metallurgical and Alloy Processes
- Liquid Crystal Research Advancements
Hochschule Bielefeld
2023-2025
Technical University of Darmstadt
2019-2024
Leibniz Institute for Solid State and Materials Research
2015-2021
Kemerovo State University
2014-2019
M.N. Mikheev Institute of Metal Physics
2015-2017
Ural Federal University
2012-2017
Technische Universität Dresden
2016-2017
Measurements of the magnetization in quasistatic and pulsed magnetic fields with different sweep rates, measurements specific heat various fields, direct adiabatic temperature change have been employed to study metamagnetic phase transition from an antiferromagnetic (AF) ferromagnetic (FM) state ${({\mathrm{Fe}}_{0.98}{\mathrm{Ni}}_{0.02})}_{49}{\mathrm{Rh}}_{51}$ alloy a critical AF-FM temperature, ${T}_{\mathrm{tr}}$, reduced 266 K. Based on obtained results, diagram for this has...
Magnetic phase transitions in alloys are highly influenced by the sample preparation techniques. In present research, electronic and magnetic properties of Fe48Cr3Rh49 with varying cooling rates were studied, both experimentally theoretically. The degree crystalline ordering was found to depend on rate employed after annealing alloy. Modeling alloy structures different degrees carried out via strategic selection substitution positions distances between chromium atoms. Theoretical...
A model of a “smart” composite based on thermosensitive PNIPAM polymer deposited FeRh substrate with modified periodic microstructure was proposed. The initial parameters the were determined from properties actual sample and its components. Cooling using magnetic field shown by two independent methods, at ~37 °C, it −5.5 °C when 1.8 T applied. Based experimental data, models traditional PNIPAM/FeRh composites constructed. Calculations show that surface modification allows for an increase in...
Among the magnetocaloric materials featuring first-order phase transitions (FOPT), FeRh is considered as a reference system to study FOPT because it "simple" binary with CsCl structure exhibiting large adiabatic temperature change. Recently, ab initio theory predicted that changes in Fe/Rh stoichiometry vicinity of equiatomic composition strongly influence characteristics. However, this theoretical prediction was not clearly verified experimentally. Here, we investigated dependence...
We present a new instrument for advanced magnetic studies based on the high field X-ray circular dichroism (XMCD) end-station developed at beamline ID12 of European Synchrotron Radiation Facility (ESRF, Grenoble, France). It offers unique possibility to measure simultaneously element-specific and macroscopic properties related magnetic, electronic, structural degrees freedom materials. Under strictly same experimental conditions, one can XMCD response, magnetization, volume changes, caloric...
It has been established, that proton-exchanged LiNbO3 waveguides have a marked subsurface layer with structural disorder inducing degradation of electro-optical properties these waveguides. At the same time, such is found to be less pronounced in soft (SPE) comparison annealed (APE) ones. The experimental samples phase modulators fabricated by SPE technique exhibit better efficiency compared produced standard and improved APE techniques.
At ambient pressure, the Fe 0.49 (Rh 1- x Pd ) 0.51 alloys with concentration within 0 < 0.12 exhibit an antiferromagnetic (AF) state below critical temperature T t , while above = have a ferromagnetic (F) order up to Curie C 650 K. The and field dependences of magnetization in 0.08; 0.13 were investigated under hydrostatic pressure 10 kbar. application about 8.5 kbar is observed induce F-AF phase transition ferromagnetically ordered compound 0.13. AF-F-AF evolution was revealed...
By simultaneous measurements in a purpose-built setup, an electric-field manipulation of the magnetocaloric effect and strain Fe49Rh51/PZT composite with sandwich-type connection was demonstrated. Using from two gauges attached to opposite sides composite, as well finite element modeling (FEM) simulations, it shown that deformation is bending type. Mechanical induced by electric field does not exceed ∼500 ppm, which four times smaller than expansion FeRh during transition ∼2000 ppm. Applying...
Metallic/intermetallic materials with BCC structures hold an intrinsic instability due to phonon softening along [110] direction, causing lower-symmetry phases transformation when the are thermally or mechanically stressed. Fe50Rh50 binary system is one of exceptional (ordered-B2) that has not been yet showing such upon application thermal stress, although mechanical deformation results in B2 disordered FCC (γ) and L10 transformation. Here, a comprehensive transmission electron microscopy...
The measured heat capacity C of solids is thought in general to involve the change internal energy which a state property. Therefore electron density states at Fermi level derived from low-temperature data C=γ T + β T3. La(Fe0.88Al0.12-xSix)13 compounds are antiferromagnets (AFM) TN=200 K with 0<x<0.03 and ferromagnets (FM) 0.03<x<0.12 TC=194 K. For x=0.024 x=0.027 metamagnetic phase transition AFM field-induced FM (FIFM) occurs low external magnetic field. FIFM sample remains if field turns...
The ability to control by physical properties of the thermoresponsive polymer PNIPAM magnetocaloric effect was demonstrated in-situ experiments on PNIPAM/FeRh smart composite. concept drug release loaded in composite applying 3 T magnetic field using an example doxorubicin. Released results were detected IV-VIS and Raman spectroscopy. In vitro, studies have a high degree scaffold biocompatibility for primary mouse embryonic fibroblasts (PMEF) cell culture. PMEFs effectively ad-hered surface...