Magnetic anisotropy,magnetostriction and intermediate range order in Co-P alloys |
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Authors: | K Hüller M Sydow G Dietz |
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Institution: | II. Physikalisches Institut der Universität Köln, Zülpicher Straβe 77, D 5000 Cologne 41, Fed. Rep. Germany |
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Abstract: | Coercivity, magnetostriction and saturation field as a measure of magnetic ansitropy energy have been investigated in Co100-xPx with 5 ? x ? 26. According to their magnetization curves and coercivities crystalline alloys (5 ? x ? 11) contain hcp-inclusions whereas amorphous material (12 ? x ? 26) is magnetically soft. The saturation magnetization is mainly determined by the nearest neighbour shell but magnetostriction is also correlated with the further environment of the cobalt atoms. The abrupt breakdown of the value |λs| of the saturation magnetostriction with increasing phosphorus content of the crystalline alloys points to a growing structural disorder. λs of the amorphous material depends on the saturation magnetization alone (λs ≈ σ02) which decreases with increasing phosphorus content. The small value of λs suggests that angular correlations do not exceed the second coordination shell. |
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