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Article
Field-driven structural phase transition and sign-switching magnetocaloric effect in Ni–Mn–Sn
Applied Physics Letters
  • M. Pasquale, Istituto Nazionale di Ricerca Metrologica
  • C. P. Sasso, Istituto Nazionale di Ricerca Metrologica
  • L. Giudici, Politecnico di Torino
  • Thomas A. Lograsso, Iowa State University
  • Deborah L. Schlagel, Iowa State University
Document Type
Article
Publication Date
9-26-2007
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
Date Available
2013-09-24
File Format
application/pdf
Citation Information
M. Pasquale, C. P. Sasso, L. Giudici, Thomas A. Lograsso, et al.. "Field-driven structural phase transition and sign-switching magnetocaloric effect in Ni–Mn–Sn" Applied Physics Letters Vol. 91 Iss. 13 (2007) p. 131904
Available at: http://works.bepress.com/thomas_lograsso/96/