Effects of B on Magnetic and Magnetostrictive Properties of Tb-Fe Thin Films

概要

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The effects of B are investigated on magnetic and magnetostrictive properties of Tb-Fe thin films over a wide B content range up to 5.59 at.%. Instrinsic saturation properties such as saturation magnetization and magnetostriction are found to decrease with increasing B content. The B content dependence of in-plane anisotropy is rather complicated for thin films with a low Tb content where in-plane anisotropy of B-free thin films is weak; in-plane anisotropy deteriorates with a small B addition, but it is enhanced by the addition of a large amount of B. However, anisotropy is little affected by the B addition for thin films with the high Tb fractions where strong in-plane anisotropy already exists without the addittion of B. Over the whole composition range examined in this work, the coercive force tends to decrease with increasing B content. A very larget magnetostriction of 144 ppm at a magnetic field of 30 Oe, which is large reported so far in Tb-Fe based thin films, is achieved in a (Tb_<0.46>Fe_<0.54>)_<94.41>B_<5.59> thin film.
社団法人日本磁気学会の論文
1999-01-20