MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Influence of Fe and Co on Phase Transitions in Ni-Mn-Ga Alloys
Vladimir V. KhovailoToshihiko AbeViktor V. KoledovMinoru MatsumotoHirokazu NakamuraRyunosuke NoteMakoto OhtsukaVladimir G. ShavrovToshiyuki Takagi
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2003 Volume 44 Issue 12 Pages 2509-2512

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Abstract

Differential scanning calorimetry (DSC) and magnetic measurements were performed to study the influence of ferromagnetic 3-d transition elements Fe and Co on structural and magnetic properties of ferromagnetic shape memory alloys Ni2MnGa. Addition of Fe or Co on the Ni sites decreases the temperature of martensitic phase transition Tm, whereas addition of Co on the Mn sites results in a considerable increase of Tm. Magnetic measurement revealed that Curie temperature TC increases upon substitution of Fe or Co for Ni. This observation is of importance for design of high temperature ferromagnetic shape memory alloys.

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© 2003 The Japan Institute of Metals and Materials
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