Magnetostrictive properties of Hox Tb1 −x Fe2 intermetallic compounds

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Abstract
The magnetostriction of several polycrystalline compounds in the Hox Tb1−x Fe2 series have been measured from 77–300°K using magnetic fields up to 17.5 kOe. The extrapolated saturation magnetostriction at room temperature varies linearly with x between 80 × 10−6 for HoFe2 and 1720 × 10−6 for TbFe2, in good agreement with the single-ion model. At the composition x =0.85, where the lowest-order anisotropy constant K1 is very small, the saturation magnetostriction is 325 × 10−6, suggesting that this material might be useful in magnetostrictive device applications.

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