Document Type

Article

Publication Date

9-26-2007

Journal or Book Title

Applied Physics Letters

Volume

91

Issue

13

First Page

131904

DOI

10.1063/1.2790829

Abstract

Depending on the starting equilibrium temperature, the application of a magnetic field on a sample of Ni–Mn–Sn produces sample heating or cooling during adiabatic experiments. The competition between endothermal and exothermal effects is observed close to the martensite-to-austenite magnetostructural phase transition. A model assuming the coexistence of two phases and a field dependence of their volume allows to compute the evolution of entropy and heat capacity during the phase transition. The correct fitting of the results suggests that the field-induced reduction of the martensite-to-austenite transition temperature is responsible for the observed sign switching of the magnetocaloric effect.

Comments

The following article appeared in Applied Physics Letters 91 (2007): 131904 and may be found at http://dx.doi.org/10.1063/1.2790829.

Rights

Copyright 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Copyright Owner

American Institute of Physics

Language

en

File Format

application/pdf

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