Magnetic field effect on premartensitic transition in Ni-Mn-Ga alloys

被引：20

作者：

Barandiaran, J. M. ^{[1
]}

Chernenko, V. A. ^{[1
]}

Lazpita, P. ^{[1
]}

Gutierrez, J. ^{[1
]}

Orue, I. ^{[1
]}

Feuchtwanger, J. ^{[1
]}

Besseghini, S. ^{[2
]}

机构：

[1] Univ Basque Country, Dpto Elect & Elect, E-48080 Bilbao, Spain

[2] CNR IENI, I-23900 Lecce, Italy

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 05期

关键词：

electrical resistivity; ferromagnetic materials; gallium alloys; magnetic anisotropy; manganese alloys; martensitic transformations; nickel alloys; shape memory effects; stoichiometry; MARTENSITIC-TRANSFORMATION; PHASE-TRANSITION; NI2MNGA; TEMPERATURE;

D O I：

10.1063/1.3079677

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Extensive measurements of the temperature dependencies of resistivity under constant magnetic fields made it possible to clarify the premartensitic transition sensitivity to applied magnetic field up to 14 T in polycrystalline and monocrystalline Ni-Mn-Ga alloys with compositions close to the stoichiometric one. A low-field minimum on the transition temperature versus magnetic field curves is found in both alloys. This minimum is attributed to the magnetic anisotropy contribution to the Clausius-Clapeyron relationship, which describes the premartensitic transition. This contribution is confirmed by magnetization loops measurements.

引用

页数：3

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