Multicaloric effect in FeRh, exploiting the thermal hysteresis in a multi-stimuli cycle combining pulsed magnetic field and uniaxial load
Abstract
Large magnetocaloric effects can be observed in materials with first-order magneto-structural phase transition. However, materials with large thermal hysteresis show a reduced effect in moderate fields (∼2 T) because the external field is insufficient to induce a fully reversible transformation. The hysteresis can be overcome or even exploited by applying a second external stimulus. A multi-stimuli test bench has been built to demonstrate the multicaloric effect in FeRh alloy using a pulsed magnetic field up to 9 T and a uniaxial stress of up to 700 MPa. A cyclic multicaloric effect of ±2.5 K could be observed for a sequential application of a pulsed field of 3 T and a uniaxial stress of 700 MPa. The interplay among external field strength, thermal hysteresis, and the transition width enables the use of pulsed magnetic fields and allows a decoupling of the applied magnetic field and the heat transfer process in the multi-stimuli cycle.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (10)
F. Scheibel
Functional Materials, Institute of Materials Science, Technical University of Darmstadt 1 , Peter-Grünberg-Straße 16, 64287 Darmstadt,
N. Shayanfar
Functional Materials, Institute of Materials Science, Technical University of Darmstadt 1 , Peter-Grünberg-Straße 16, 64287 Darmstadt,
L. Pfeuffer
Functional Materials, Institute of Materials Science, Technical University of Darmstadt 1 , Peter-Grünberg-Straße 16, 64287 Darmstadt,
T. Gottschall
Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf 1 , 01328 Dresden,
S. Dittrich
A. Taubel
Functional Materials, Institute of Materials Science, Technical University of Darmstadt 1 , Peter-Grünberg-Straße 16, 64287 Darmstadt,
A. Aubert
Functional Materials, Institute of Materials Science, Technical University of Darmstadt 1 , Peter-Grünberg-Straße 16, 64287 Darmstadt,
I. Radulov
Functional Materials, Institute of Materials Science, Technical University of Darmstadt 1 , Peter-Grünberg-Straße 16, 64287 Darmstadt,
K. P. Skokov
Functional Materials, Institute of Materials Science, Technical University of Darmstadt 1 , Peter-Grünberg-Straße 16, 64287 Darmstadt,
O. Gutfleisch
Functional Materials, Institute of Materials Science, Technical University of Darmstadt 1 , Peter-Grünberg-Straße 16, 64287 Darmstadt,