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Temperature dependence of anisotropy field in Co-Ti substituted Ba-ferrite particles

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2 Author(s)
Kishimoto, Mikio ; Hitachi Maxwell Ltd., Kyoto, Japan ; Kitahata, S.

Co-Ti substituted Ba-ferrite particles were prepared, and the crystalline and shape anisotropy energies were measured in the temperature range of 78 K to 400 K to determine the crystalline anisotropy field of the particles. The crystalline anisotropy energy and the crystalline anisotropy field at room temperature were about 0.67×106 erg/cm3 and about 4700 Oe, respectively. A similar temperature dependence was observed between the effective anisotropy field and the coercivity. This and a high intrinsic coercivity indicate coherent rotation of the magnetic moment in single-domain particles

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Magnetics, IEEE Transactions on  (Volume:25 ,  Issue: 5 )