Magnetic field-induced reverse transformation in B2-type NiCoMnAl shape memory alloys

Effects of the addition of Co to the NiMnAl alloy on the martensitic and magnetic properties were investigated. The magnetic properties of the parent (P) phase drastically changed from paramagnetic to ferromagnetic, while the magnetization in the martensite (M) phase slightly decreased with increasi...

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Bibliographic Details
Published in:Applied physics letters 2008-09, Vol.93 (9)
Main Authors: Kainuma, R., Ito, W., Umetsu, R. Y., Oikawa, K., Ishida, K.
Format: Article
Language:English
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Summary:Effects of the addition of Co to the NiMnAl alloy on the martensitic and magnetic properties were investigated. The magnetic properties of the parent (P) phase drastically changed from paramagnetic to ferromagnetic, while the magnetization in the martensite (M) phase slightly decreased with increasing Co composition. Consequently, in the Ni40Co10Mn33Al17 alloy with the B2 ordered structure, the martensitic transformation from a ferromagnetic P to a weak magnetic M phase was obtained. The martensitic transformation temperatures in this alloy decreased by about 30K with the application of a magnetic field of 7T and a metamagnetic phase transformation was confirmed.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2965811