| 压应力对Fe0.81 Ga0.19单晶磁化和磁致伸缩的影响 |
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| 引用本文： | 张辉,曾德长,刘仲武.压应力对Fe0.81 Ga0.19单晶磁化和磁致伸缩的影响[J].物理学报,2011,60(6):67503-067503. |
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| 作者姓名： | 张辉 曾德长 刘仲武 |
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| 作者单位： | 华南理工大学材料科学与工程学院,广州 510640 |
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| 基金项目： | 国家自然科学基金(批准号:U0734001, 50874050)资助的课题. |
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| 摘 要： | 研究了Fe0.81Ga0.19合金单晶沿100]方向的磁机械效应和磁致伸缩效应.基于Stoner-Wohlfarth模型,通过数值计算获得了在压应力和外磁场联合作用下磁化强度的方向余弦.研究表明,随着压应力的增加,退磁态下合金中的磁各向异性会由三轴各向异性向双轴各向异性转变.这使得合金中 90° 畴的体积分数增加,导致磁致伸缩效应增大.
关键词：
FeGa合金
磁机械效应
巨磁致伸缩效应
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| 关 键 词： | FeGa合金 磁机械效应 巨磁致伸缩效应 |
| 收稿时间： | 2010-08-31 |
Effect of compressive stress on the magnetization and magnetostriction of Fe0.81 Ga0.19 alloy |
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| Zhang Hui,Zeng De-Chang,Liu Zhong-Wu.Effect of compressive stress on the magnetization and magnetostriction of Fe0.81 Ga0.19 alloy[J].Acta Physica Sinica,2011,60(6):67503-067503. |
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| Authors: | Zhang Hui Zeng De-Chang Liu Zhong-Wu |
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| Institution: | School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | The magnetomechanical effect and the magnetostriction in the <100>-oriented single crystal of Fe0.81Ga0.19 alloy have been investigated on the basis of Stoner-Wohlfarth model. The results have shown that in the demagnetized state the degeneracy of the resultant anisotropy in the alloy from the original cubic magnetocrystalline anisotropy into the biaxial anisotropy occurs under a critical stress. This leads to an increase in the fractional occupancy of 90° domain which causes an increase the bulk magnetostriction. |
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| Keywords: | FeGa alloy magnetomechanical effect magnetostriction |
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