TITLE

Giant enhancement in the magnetostrictive effect of FeGa alloys doped with low levels of terbium

AUTHOR(S)
Jiang, Liping; Yang, Jiandong; Hao, Hongbo; Zhang, Guangrui; Wu, Shuangxia; Chen, Yajie; Obi, Ogheneyunume; Fitchorov, Trifon; Harris, Vincent G.
PUB. DATE
June 2013
SOURCE
Applied Physics Letters;6/3/2013, Vol. 102 Issue 22, p222409
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 λ = 72 × 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.
ACCESSION #
88041278

 

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