Tb掺杂Fe83Ga17快淬薄带的巨磁致伸缩效应
Giant magnetostriction in Tb-doped Fe83Ga17 melt-spun ribbons
摘要：
在微掺Tb的Fe_（83）Ga_（17）快淬薄带中实现了超磁致伸缩。测试的平均垂直磁致伸缩Fe82.89Ga16.88Tb0.23合金中沿熔纺带方向为~ 886 ppm。计算得到的平行磁致伸缩系数为1772 ppm，是二元合金Fe_（83）Ga_（17）的4倍多。增强的磁致伸缩应归因于在快速凝固过程中少量Tb固溶到A2基体相中。Tb的磁晶各向异性是引起巨磁致伸缩效应的主要原因。
英文摘要：
Giant magnetostriction is achieved in the slightly Tb-doped Fe83Ga17 melt-spun ribbons. The tested average perpendicular magnetostriction is -886 ppm along the melt-spun ribbon direction in the Fe82.89Ga16.88Tb0.23 alloy. The calculated parallel magnetostriction is 1772 ppm, more than 4 times as large as that of binary Fe83Ga17 alloy. The enhanced magnetostriction should be attributed to a small amount of Tb solution into the A2 matrix phase during rapid solidification. The localized strong magnetocrystalline anisotropy of Tb element is suggested to cause the giant magnetostriction.
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