Reverse magnetostructural transformation in Co-doped NiMnGa multifunctional alloys

被引：55

作者：

Fabbrici, S. ^{[1
]}

Albertini, F. ^{[1
]}

Paoluzi, A. ^{[1
]}

Bolzoni, F. ^{[1
]}

Cabassi, R. ^{[1
]}

Solzi, M. ^{[2
,3
]}

Righi, L. ^{[4
]}

Calestani, G. ^{[4
]}

机构：

[1] IMEM CNR, I-43100 Parma, Italy

[2] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy

[3] Univ Parma, CNISM, I-43100 Parma, Italy

[4] Univ Parma, Dipartimento Chim, GIAF, I-43100 Parma, Italy

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 02期

关键词：

cobalt alloys; Curie temperature; doping profiles; gallium alloys; magnetisation; manganese alloys; nickel alloys; paramagnetic materials; reverse martensitic transformations; TRANSITIONS;

D O I：

10.1063/1.3179551

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We studied the composition dependence of the structural and magnetic properties of Co-doped Ni-Mn-Ga alloys around the Mn-rich composition Ni50Mn30Ga20. By varying the Co and Mn content we have been able to tune the critical temperatures. In particular, in a suitable composition range, the Curie temperature of martensite is lower than Curie temperature of austenite and lower than martensitic transformation temperature, giving rise to a paramagnetic gap between magnetically ordered martensite and austenite and to the occurrence of a reverse magnetostructural transformation.

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页数：3

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