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The fundamental magnetic properties of CoM (M = IIIB to IVB metals) amorphous films produced by sputtering are described. The composition dependence of their magnetic properties is relatively weak but the magnetostriction shows a clear dependence on the size of the solute metal. The thermal stability of the magnetic anisotropy of CoZr suggests that the presence of defects or vacancies introduced by impurities in the films plays an important role in determining the magnetically induced anisotropy. CoZrNb films with nearly zero-magnetostriction are produced. These films show good thermal stability and high saturation magnetization compared with those of conventional zero-magnetostricitve FeCoSiB amorphous alloys.
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Yutaka Shimada (1984) studied this question.
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