Effect of chemical and hydrostatic pressure on the coupled magnetostructural transition of Ni-Mn-In Heusler alloys
Devi P, Mejia CS, Caron L, Singh S, Nicklas M, Felser C (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 3
Article Number: 122401
Journal Issue: 12
DOI: 10.1103/PhysRevMaterials.3.122401
Abstract
Ni-Mn-In magnetic shape-memory Heusler alloys exhibit generally a large thermal hysteresis at their first-order martensitic phase transition which hinders a technological application in magnetic refrigeration. By optimizing the Cu content in Ni2CuxMn1.4-xIn0.6, we obtained a thermal hysteresis of the martensitic phase transition in Ni2Cu0.2Mn1.2In0.6 of only 6 K. We can explain this very small hysteresis by an almost perfect habit plane at the interface of martensite and austenite phases. Application of hydrostatic pressure does not reduce the hysteresis further, but shifts the martensitic transition close to room temperature. The isothermal entropy change does not depend on warming or cooling protocols and is pressure independent. Experiments in pulsed-magnetic fields on Ni2Cu0.2Mn1.2In0.6 find a reversible magnetocaloric effect with a maximum adiabatic temperature change of -13 K.
Involved external institutions
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
Universität Bielefeld
Germany (DE)
Germany (DE)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
Universität Bielefeld
Germany (DE)
How to cite
APA:
Devi, P., Mejia, C.S., Caron, L., Singh, S., Nicklas, M., & Felser, C. (2019). Effect of chemical and hydrostatic pressure on the coupled magnetostructural transition of Ni-Mn-In Heusler alloys. Physical Review Materials, 3(12). https://doi.org/10.1103/PhysRevMaterials.3.122401
MLA:
Devi, P., et al. "Effect of chemical and hydrostatic pressure on the coupled magnetostructural transition of Ni-Mn-In Heusler alloys." Physical Review Materials 3.12 (2019).
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