Influence of Cr substitution on the reversibility of the magnetocaloric effect in Ni-Cr-Mn-In Heusler alloys

C. Salazar-Mejía, P. Devi, S. Singh, C. Felser, and J. Wosnitza
Phys. Rev. Materials 5, 104406 – Published 13 October 2021
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Abstract

We present the effect of substitution-induced pressure on the reversibility of the magnetocaloric effect (MCE) in Ni2CrxMn1.4xIn0.6 (x=0.1, 0.2, 0.3) alloys, through characterization in pulsed magnetic fields. We measured the adiabatic temperature change ΔTad directly during applied magnetic field pulses of 2 and 6 T. We paid special attention to the reversibility of ΔTad. The substitution of Mn by Cr in Ni2Mn1.4In0.6 leads to a negative pressure, as evidence by the increase of the lattice parameters, which shifts the martensitic transition towards lower temperatures and enhances the ferromagnetism of the martensite phase. We found a large value of ΔTad=7 K at T=270 K for the sample with x=0.1 for a field change of 6 T. We discuss the reversibility of the MCE in these alloys in terms of the Clausius-Clapeyron equation.

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  • Received 28 May 2021
  • Revised 19 August 2021
  • Accepted 29 September 2021

DOI:https://doi.org/10.1103/PhysRevMaterials.5.104406

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

C. Salazar-Mejía1,*, P. Devi2,3,4, S. Singh2,5, C. Felser2, and J. Wosnitza1,6

  • 1Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
  • 2Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
  • 3Center for Quantum Nanoscience, Institute for Basic Science (IBS), Seoul 03760, Republic of Korea
  • 4Department of Physics, Ewha Womans University, Seoul 03760, Republic of Korea
  • 5School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi-221005, India
  • 6Institut für Festkörper- und Materialphysik, TU Dresden, 01062 Dresden, Germany

  • *c.salazar-mejia@hzdr.de

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Issue

Vol. 5, Iss. 10 — October 2021

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