TY - JOUR
T1 - Cooling-induced shape memory effect and inverse temperature dependence of superelastic stress in Co2Cr(Ga,Si) ferromagnetic Heusler alloys
AU - Xu, Xiao
AU - Omori, Toshihiro
AU - Nagasako, Makoto
AU - Okubo, Akinari
AU - Umetsu, Rie Y.
AU - Kanomata, Takeshi
AU - Ishida, Kiyohito
AU - Kainuma, Ryosuke
N1 - Funding Information:
The authors would like to express their thanks to Mr. Hiroki Satoh for assistance during the preliminary experiments. Professor K. R. A. Ziebeck is acknowledged for the critical reading for this manuscript. A part of the experiments were performed at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University. This study was supported by a Grant-in-Aid for Scientific Research and Japan Society for the Promotion of Science (JSPS).
PY - 2013/10/14
Y1 - 2013/10/14
N2 - 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.
AB - 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.
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U2 - 10.1063/1.4825271
DO - 10.1063/1.4825271
M3 - Article
AN - SCOPUS:84886431486
SN - 0003-6951
VL - 103
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 16
M1 - 164104
ER -