Theoretical description of magnetocaloric effect in the shape memory alloy exhibiting metamagnetic behavior

by / Monday, 22 February 2016 / Published in

Theoretical description of magnetocaloric effect in the shape memory alloy exhibiting metamagnetic behavior


Published in: Journal of Applied Physics, 119, 013902
IN PRESS
Publisher URL: http://scitation.aip.org/content/aip/journal/jap/119/1/10.1063/1.4939556
DOI: http://doi.org/10.1063/1.4939556 Authors:
Victor A L’vov Anna Kosogor José Manuel Barandiarán Volodymyr Chernenko
Abstract:

A simple thermodynamic theory is proposed for the quantitative description of giant magnetocaloric effect observed in metamagneticshape memoryalloys. Both the conventional magnetocaloric effect at the Curie temperature and the inverse magnetocaloric effect at the transition from the ferromagnetic austenite to a weakly magnetic martensite are considered. These effects are evaluated from the Landau-type free energy expression involving exchange interactions in a system of a two magnetic sublattices. The findings of the thermodynamic theory agree with first-principles calculations and experimental results from Ni-Mn-In-Co and Ni-Mn-Sn alloys, respectively.

Ask an author a personal copy of its work

RESEARCH LINE


Be sociable, share!
Facebooktwittergoogle_plusredditpinterestlinkedintumblrmailFacebooktwittergoogle_plusredditpinterestlinkedintumblrmail
TOP