Direct measurements of the magnetocaloric effect in pulsed magnetic fields: The example of the Heusler alloy Ni50Mn35In15

Zavareh MG, Mejia CS, Nayak AK, Skourski Y, Wosnitza J, Felser C, Nicklas M (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Applied Physics Letters American Institute of Physics (AIP)

Book Volume: 106

Article Number: 071904

Journal Issue: 7

DOI: 10.1063/1.4913446

Abstract

We have studied the magnetocaloric effect (MCE) in the shape-memory Heusler alloy Ni50Mn35In15 by direct measurements in pulsed magnetic fields up to 6 and 20 T. The results in 6 T are compared with data obtained from heat-capacity experiments. We find a saturation of the inverse MCE, related to the first-order martensitic transition, with a maximum adiabatic temperature change of ΔTad = -7 K at 250 K and a conventional field-dependent MCE near the second-order ferromagnetic transition in the austenitic phase. The pulsed magnetic field data allow for an analysis of the temperature response of the sample to the magnetic field on a time scale of ∼10 to 100 ms, which is on the order of typical operation frequencies (10-100 Hz) of magnetocaloric cooling devices. Our results disclose that in shape-memory alloys, the different contributions to the MCE and hysteresis effects around the martensitic transition have to be carefully considered for future cooling applications.

Involved external institutions

Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Zavareh, M.G., Mejia, C.S., Nayak, A.K., Skourski, Y., Wosnitza, J., Felser, C., & Nicklas, M. (2015). Direct measurements of the magnetocaloric effect in pulsed magnetic fields: The example of the Heusler alloy Ni50Mn35In15. Applied Physics Letters, 106(7). https://doi.org/10.1063/1.4913446

MLA:

Zavareh, M. Ghorbani, et al. "Direct measurements of the magnetocaloric effect in pulsed magnetic fields: The example of the Heusler alloy Ni50Mn35In15." Applied Physics Letters 106.7 (2015).

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