Pulsed high-magnetic-field experiments: New insights into the magnetocaloric effect in Ni-Mn-In Heusler alloys

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

Publication Type: Journal article

Publication year: 2015

Journal

Journal of Applied Physics AIP Publishing

Book Volume: 117

Article Number: 17E710

Journal Issue: 17

DOI: 10.1063/1.4916556

Abstract

The present pulsed high-magnetic-field study on Ni50Mn35In15 gives an extra insight into the thermodynamics of the martensitic transformation in Heusler shape-memory alloys. The transformation-entropy change, ΔS, was estimated from field-dependent magnetization experiments in pulsed high magnetic fields and by heat-capacity measurements in static fields. We found a decrease of ΔS with decreasing temperature. This behavior can be understood by considering the different signs of the lattice and magnetic contributions to the total entropy. Our results further imply that the magnetocaloric effect will decrease with decreasing temperature and, furthermore, the martensitic transition is not induced anymore by changing the temperature in high magnetic fields.

Involved external institutions

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

How to cite

APA:

Mejia, C.S., Zavareh, M.G., Nayak, A.K., Skourski, Y., Wosnitza, J., Felser, C., & Nicklas, M. (2015). Pulsed high-magnetic-field experiments: New insights into the magnetocaloric effect in Ni-Mn-In Heusler alloys. Journal of Applied Physics, 117(17). https://doi.org/10.1063/1.4916556

MLA:

Mejia, C. Salazar, et al. "Pulsed high-magnetic-field experiments: New insights into the magnetocaloric effect in Ni-Mn-In Heusler alloys." Journal of Applied Physics 117.17 (2015).

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