Cooling-induced shape memory effect and inverse temperature dependence of superelastic stress in Co2Cr(Ga,Si) ferromagnetic Heusler alloys

Xiao Xu, Toshihiro Omori, Makoto Nagasako, Akinari Okubo, Rie Y. Umetsu, Takeshi Kanomata, Kiyohito Ishida, Ryosuke Kainuma

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36 Citations (Scopus)

Abstract

Normally, shape memory effect (SME) is obtained by the reverse martensitic transformation, therefore only induced by heating a sample from the deformed martensite phase. In this study, we report a phenomenon of cooling-induced SME, observed in a Co2Cr(Ga,Si) Heusler alloy, where the normal heating-induced SME can be obtained at the same time. The cooling-induced SME is attributed to an abnormal martensitic transformation in Co2Cr(Ga,Si) Heusler alloy. Moreover, an inverse temperature dependence of superelastic stress was also observed. The discoveries of these phenomena provide application possibilities for shape memory alloys, especially at low temperatures.

Original languageEnglish
Article number164104
JournalApplied Physics Letters
Volume103
Issue number16
DOIs
Publication statusPublished - 2013 Oct 14

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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