Giant enhancement in the magnetostrictive effect of FeGa alloys doped with low levels of terbium
Giant enhancement in the magnetostrictive effect of FeGa alloys doped with low levels of terbium
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DOI：
10.1063/1.4809829
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发表时间：
2013-06-03
影响因子：
4
通讯作者：
Harris, Vincent G.
中科院分区：
文献类型：
--
作者：
Jiang, Liping;Yang, Jiandong;Harris, Vincent G.
研究了Tb对真空电弧法和定向凝固法制备的Fe83Ga17Tbx(x=0，0.2，0.4，0.6和0.8)合金显微组织和磁性能的影响。实验表明，少量的Tb使[110]织构Fe83Ga17合金的饱和磁致伸缩增加了一倍以上，并降低了磁致伸缩饱和场。磁致伸缩的显著增加源于多晶合金中[100]织构的出现。结果表明，Tb原子优先存在于富Tb晶界相中，增强了[110]和[100]织构。(C)2013 AIP出版有限责任公司。
We present the effects of terbium additives upon the microstructure and magnetic properties of Fe83Ga17Tbx alloys (x = 0, 0.2, 0.4, 0.6, and 0.8), prepared by vacuum electric arc-melting and directional solidification techniques. Experiments indicate that small amounts of terbium more than double the saturation magnetostriction of a [110] textured Fe83Ga17 alloy with lambda = 72 x 10(-6) and lower the magnetostriction saturation field. The pronounced increase in magnetostriction stems from the appearance of [100] texture in polycrystalline alloys. It is verified that [110] and [100] textures are enhanced by the introduction of terbium atoms preferentially residing in a Tb-rich intergranular phase. (C) 2013 AIP Publishing LLC.