Magnetic shape memory effect at 1.7 K

Magnetic shape memory effect or magnetically induced structure reorientation (MIR) occurred down to 1.7 K in 10 M martensite with composition of Ni50.0Mn27.5Ga22.5 exhibiting no intermartensite transformation. The reorientation of the martensite microstructure was mediated by the motion of single Ty...

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Bibliographic Details
Published in:Applied physics letters 2013-08, Vol.103 (7)
Main Authors: Heczko, Oleg, Kopecký, Vít, Sozinov, Alexei, Straka, Ladislav
Format: Article
Language:English
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Summary:Magnetic shape memory effect or magnetically induced structure reorientation (MIR) occurred down to 1.7 K in 10 M martensite with composition of Ni50.0Mn27.5Ga22.5 exhibiting no intermartensite transformation. The reorientation of the martensite microstructure was mediated by the motion of single Type II twin boundary. In contrast with weak thermal dependence of Type II boundary, MIR with Type I boundary in the same alloy showed strong thermal dependence resembling normal thermal activation process and the effect disappeared below 220 K. Thus the type of the boundary is decisive for MIR at low temperatures.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4817941