• Rapid Communication

Effect of chemical and hydrostatic pressure on the coupled magnetostructural transition of Ni-Mn-In Heusler alloys

P. Devi, C. Salazar Mejía, L. Caron, Sanjay Singh, M. Nicklas, and C. Felser
Phys. Rev. Materials 3, 122401(R) – Published 10 December 2019

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 Ni2CuxMn1.4xIn0.6, 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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 16 October 2019

DOI:https://doi.org/10.1103/PhysRevMaterials.3.122401

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

P. Devi1,*, C. Salazar Mejía2, L. Caron3, Sanjay Singh1,4, M. Nicklas1,†, and C. Felser1

  • 1Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany
  • 2Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
  • 3Faculty of Physics, Bielefeld University, 33615 Bielefeld, Germany
  • 4School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi-221005, India

  • *Present address: Division of Materials Science and Engineering, Ames Laboratory, Ames, IA 50011, USA; parul.devi@cpfs.mpg.de
  • nicklas@cpfs.mpg.de

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 3, Iss. 12 — December 2019

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Materials

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×