A5040067148- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties of Alloys
- Magnetic properties of thin films
- Rare-earth and actinide compounds
- Magnetic Properties and Applications
- MXene and MAX Phase Materials
- Shape Memory Alloy Transformations
- Multiferroics and related materials
- Metallic Glasses and Amorphous Alloys
- Advanced Condensed Matter Physics
- Inorganic Chemistry and Materials
- Magnetic Properties and Synthesis of Ferrites
- Theoretical and Computational Physics
- ZnO doping and properties
- Thermal Expansion and Ionic Conductivity
- Microstructure and Mechanical Properties of Steels
- Machine Learning in Materials Science
- Iron-based superconductors research
- High Entropy Alloys Studies
- Catalytic Processes in Materials Science
- Electromagnetic wave absorption materials
- High-pressure geophysics and materials
- Aluminum Alloys Composites Properties
- Magneto-Optical Properties and Applications
- Microstructure and mechanical properties
Virginia Commonwealth University
2018-2025
Northeastern University
2011-2021
Iowa State University
2020
United States Department of Energy
2020
Ames National Laboratory
2020
University at Buffalo, State University of New York
2008
Correlations between magnetic transition temperatures and the average weighted valence band electron concentration ((s + d) electrons/atom) have led to development of a phenomenological model that predicts influence elemental substitution on magnetostructural response bulk B2-ordered Fe(Rh1−xMx) or (Fe1−xMx)Rh alloys (M = elements; x < 6 at. %). Validation this is provided through synthesis characterization FeRh with Cu Au additions. The data associated trends indicate lattice...
We report on the multicaloric response of ${\mathrm{Fe}}_{49}{\mathrm{Rh}}_{51}$ alloy under combined application hydrostatic pressure and magnetic field. Experimental data are complemented by a mean field model that takes into account interplay between structural degrees freedom. A large strength has been found for this alloy, it is shown suitable combination enables sign entropy change to be reversed thus effect can tuned from conventional inverse. It also an extended temperature window...
Linear magnetoresistance (LMR) occurs in semiconductors as a consequence of strong electrical disorder and is characterized by nonsaturating that proportional to the applied magnetic field. By investigating disordered MnAs-GaAs composite material, it found magnitude LMR numerically equal carrier mobility over wide range independent density. This behavior complementary Hall effect dependent on Moreover, appears be insensitive details points universal explanation classical can other material systems.
Abstract A significant barrier to the commercialization of magnetic heat pumping is lack scalable, low-cost manufacturing techniques that enable shaping brittle magnetocaloric materials into exchange structures with porous geometries, controlled chemical gradients, and advantageous anisotropic microstructures. Though direct ink writing additive has potential expand a viable net-shaping technology for functional alloys, it typically challenging fabricate dense parts—an observation ascribed...
Additive manufacturing (AM) is revolutionizing magnetic heat pumping technology by enabling the design and production of highly optimized, customizable components that enhance efficiency, reduce costs, accelerate innovation in thermal management systems. This review highlights recent advances AM for magnetocaloric materials, emphasizing its role fabricating exchange structures with complex geometries unique microstructures to performance. Key techniques, including material extrusion, binder...
In this work, we demonstrate that the magnetocaloric response of FeRh-based compounds may be tailored for potential magnetic refrigeration applications by chemical modification FeRh lattice. Alloys composition Fe(Rh1−xAx) or (Fe1−xBx)Rh (A = Cu, Pd; B Ni; 0 < x 0.06) were synthesized via arc-melting and subsequent annealing in vacuum at 1000 °C 48 h. The properties systems determined using isothermal M(H) curves measured vicinity magnetostructural temperature (Tt). It is found working...
$\mathrm{AlF}{\mathrm{e}}_{2}{\mathrm{B}}_{2}$ is a ferromagnet with the Curie temperature around 300 K and has potential to be an outstanding rare-earth free candidate for magnetocaloric applications. However, samples prepared from melt contain additional phases which affect functional response of phase. We report on effects Al content in initial (nominal) composition $\mathrm{A}{\mathrm{l}}_{x}\mathrm{F}{\mathrm{e}}_{2}{\mathrm{B}}_{2}$, where $x=1.0$, 1.1, 1.2 by arc-melting followed...
The chemically ordered B2 phase of equiatomic FeRh is known to absorb or evolve a significant latent heat as it traverses its first-order transition in response thermal, magnetic, and mechanical drivers. This attribute makes an ideal magnetocaloric material testbed for investigation relationships between the crystalline lattice magnetic spins, which are especially experimentally accessible thin films. In this work, epitaxial films nominal 30 nm 50 nm thicknesses with out-of-plane c-axis...
In this communication, we report the synthesis of predominantly single phase Mo2NiB2 by pressureless reactive sintering. XRD analysis showed samples were ≥95% pure. Both computational and experimental results structure space group to be orthorhombic 71: Immm, respectively. Computational has superior mechanical properties as compared ternary borides like MoAlB, WAlB Cr2AlB2. As a representative example, bulk modulus is 299.5 GPa, outperforming range 209.2–228.2 GPa observed in MAB phases....
We report, for the first time, correlations between crystal structure, microstructure and magnetofunctional response in directionally solidified [110]-textured Fe83Ga17Erx (0 < x 1.2) alloys. The morphology of doped samples consists columnar grains, mainly composed a matrix phase precipitates secondary deposited along grain boundary region. An enhancement more than ~275% from ~45 to 170 ppm is observed saturation magnetostriction value (λs) alloys with introduction small amounts Er....
Effects of nanostructuring on the magnetostructural response near-equiatomic FeRh phase were investigated in nanocomposite materials synthesized by rapid solidification and subsequent annealing an alloy nominal atomic composition (FeRh)5Cu95. Transmission electron microscopy studies confirm attainment a phase-separated system nanoscaled (∼10–15 nm diameter) precipitates, consistent with embedded Cu matrix. These nanoprecipitates are crystallographically aligned coarse-grained matrix possess...