Large Linear and Volume Magnetostriction in Fe-Ga Alloys
Large Linear and Volume Magnetostriction in Fe-Ga Alloys
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DOI：
10.4028/www.scientific.net/msf.561-565.1117
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发表时间：
2007-10
期刊：
影响因子：
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通讯作者：
Chengbao Jiang;Jinghua Liu;Fang Gao;Huibin Xu
中科院分区：
文献类型：
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作者：
Chengbao Jiang;Jinghua Liu;Fang Gao;Huibin Xu
生长速度对定向凝固Fe81Ga19磁致伸缩合金的择优取向有显着影响。在 10mm/h 至 20mm/h 的速度范围内获得了强择优取向。在74.1MPa的预应力下，取向晶体获得了294×10-6的优异磁致伸缩λ100。通过测量沿样品三维方向的长度变化，研究了具有 A2 相的铸态 Fe81Ga19 合金的线性和体积磁致伸缩。由于体积磁致伸缩的贡献，纵向磁致伸缩从0.3T时的27ppm增加到2.0T时的47ppm。通过在Fe中掺杂Ga可以显着增强体积磁致伸缩。
The growth velocity has a significant effect on the preferred orientation of the directionally solidified Fe81Ga19 magnetostrictive alloy. Strong preferred orientation was obtained for a velocity range from 10mm/h to 20mm/h. An excellent magnetostriction λ100 of 294×10-6 was achieved for the oriented crystal at a pre-stress of 74.1MPa. Linear and volume magnetostrictions were investigated in the as-cast Fe81Ga19 alloys with A2 phase by measuring the change in length along the three-dimensional directions of the samples. Due to the contribution of the volume magnetostriction, the longitudinal magnetostriction increased from 27 ppm at 0.3 T to 47 ppm at 2.0 T. The volume magnetostriction can be drastically enhanced by doping Ga in Fe.