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An additional anisotropy is induced in cobalt in h c p phase when polycrystalline specimens are cooled from high temperatures in a magnetic field through the crystalline transformation temperature. The induced anisotropy is found to be due to a preferential grain orientation of h c p phase, for which the crystalline anisotropy energy is proposed to be responsible.
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Sambongi et al. (1963) studied this question.
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