Giant multicaloric response of bulk Fe49Rh51

Enric Stern-Taulats, Teresa Castán, Antoni Planes, Laura H. Lewis, Radhika Barua, Sabyasachi Pramanick, Subham Majumdar, and Lluís Mañosa
Phys. Rev. B 95, 104424 – Published 17 March 2017

Abstract

We report on the multicaloric response of the Fe49Rh51 alloy under the combined application of hydrostatic pressure and magnetic field. Experimental data are complemented by a mean field model that takes into account the interplay between structural and magnetic degrees of freedom. A large multicaloric strength has been found for this alloy, and it is shown that a suitable combination of pressure and magnetic field enables the sign of the entropy change to be reversed and thus the multicaloric effect can be tuned from conventional to inverse. It is also shown that an extended temperature window for the multicaloric effect can be achieved by taking advantage of the coupling between structure and magnetism which enables a cross response of the alloy under the application of different external fields. Mean field calculations remarkably reproduce experimental results.

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  • Received 19 October 2016
  • Revised 28 February 2017

DOI:https://doi.org/10.1103/PhysRevB.95.104424

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Enric Stern-Taulats1, Teresa Castán1, Antoni Planes1, Laura H. Lewis2, Radhika Barua3, Sabyasachi Pramanick4, Subham Majumdar4, and Lluís Mañosa1

  • 1Departament de Física de la Matèria Condensada, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, E-08028 Barcelona, Catalonia
  • 2Department of Chemical Engineering and Department of Mechanical Engineering, Northeastern University, Boston, Massachusetts 02115, USA
  • 3Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, USA
  • 4Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India

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Issue

Vol. 95, Iss. 10 — 1 March 2017

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