Effect of hydrostatic pressure Ni2+xMn1-xGa on magnetization of alloys

被引：25
|
作者：
Kamarád, J
Albertini, F
Arnold, Z
Casoli, F
Pareti, L
Paoluzi, A
机构：
[1] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic
[2] CNR, IMEM, Parco Area Sci, I-43010 Parma, Italy
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷
关键词：
magnetization-pressure dependent; Heusler alloys; pressure effect;
D O I：
10.1016/j.jmmm.2004.11.332
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of pressures up to 1.2 GPa on saturated magnetization M-S of Ni2+xMn1-xGa (0 <= x <= 0.2) alloys has been studied at temperatures from 5 to 400 K. The pressure parameter, din Ms/dp at 5 K, varies from -0.3 x 10(-2) GPa(-1) up to -1.3 x 10(-2) GPa(-1). At temperature T-M of martensitic transition (MT), dln M-S/dp changes its sign. M-S and the Curie temperature T-C of the cubic phase of compounds increase with increasing pressure. These results are consistent with a theoretical picture of band structure of Ni2MnGa assuming a broadening and a depletion of the dominant minority Ni e. band under pressure. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：669 / 672
页数：4
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