Giant entropy change at the co-occurrence of structural and magnetic transitions in the Ni2.19Mn0.81Ga Heusler alloy

被引：162

作者：

Pareti, L

Solzi, M

Albertini, F

Paoluzi, A

机构：

[1] CNR, IMEM, I-43010 Parma, Italy

[2] Univ Parma, INFM, I-43100 Parma, Italy

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

来源：

EUROPEAN PHYSICAL JOURNAL B | 2003年 / 32卷 / 03期

关键词：

D O I：

10.1140/epjb/e2003-00102-y

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have studied the isothermal entropy change around a first-order structural transformation and in correspondence to the second-order Curie transition in, the ferromagnetic Hensler alloy Ni2.15Mn0.85Ga. The results have been compared with those obtained for the composition Ni2.19Mn0.81Ga, in which the martensitic structural transformation and the magnetic transition occur simultaneously. With a magnetic field span from 0 to 1.6 T, the magnetic entropy change reaches the value of 20 J/kg K when transitions are co-occurring, while 5 J/kg K is found when the only structural transition occurs.

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页码：303 / 307

页数：5

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