Abstract
The cubic Laves phase compounds Ho(Fe1-χMnχ)2 (χ = 0, 0.1, 0.2, 0.3, 0.4) are investigated by magnetization and magnetostriction measurements. With increasing χ value, the saturation magnetization increases and the Curie temperature drops. It was found that the easy direction magnetostriction λ100, which is estimated from polycrystalline data, increases with increasing Mn content, while the hard direction magnetostriction λ111 becomes low. This can be related to the fact that the first-order anisotropy constant K1 for the compounds, obtained by the “law of approach to saturation”, decreases with increasing Mn content.
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