Giant magnetostriction in Tb-doped Fe83Ga17 melt-spun ribbons
Wei Wu, Jinghua Liu, Chengbao Jiang, and Huibin Xu
TL;DR
This study demonstrates giant magnetostriction in Tb-doped FeGa melt-spun ribbons, with significantly enhanced magnetostrictive properties attributed to Tb's influence on the material's magnetic anisotropy.
Contribution
It reports the first observation of giant magnetostriction in Tb-doped FeGa ribbons, highlighting the role of Tb in enhancing magnetostrictive effects during rapid solidification.
Findings
Perpendicular magnetostriction of -886 ppm
Parallel magnetostriction of 1772 ppm
Enhanced magnetostriction due to Tb incorporation
Abstract
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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