Reversibility and irreversibility of magnetocaloric effect in a metamagnetic shape memory alloy under cyclic action of a magnetic field

V. V. Khovaylo, K. P. Skokov, O. Gutfleisch, H. Miki, R. Kainuma, T. Kanomata

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66 Citations (Scopus)

Abstract

We have studied adiabatic temperature change Δ Tad in a Ni50Mn36Co1Sn13 metamagnetic shape memory alloy. An irreversible character of Δ Tad has been observed in the vicinity of the reverse martensitic transformation. In this region, cyclic application of the magnetic field converts comparatively large inverse magnetocaloric effect (MCE) with Δ Tadmax =-0.8 K to a weaker conventional MCE (Δ T ad max =0.3 K). The crossover of Δ Tad has been attributed to the irreversible character of the magnetic field-induced transformation and the closeness of the martensitic transformation and Curie temperature of the austenitic phase T CA.

Original languageEnglish
Article number052503
JournalApplied Physics Letters
Volume97
Issue number5
DOIs
Publication statusPublished - 2010 Aug 2

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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