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The influence of planar defects on the coercive field of hard magnetic materials

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Abstract

Planar defects are found to act as strong pinning centres in hard magnetic materials. The interaction of the domain wall with planar defects is assumed to originate in a local perturbation of exchange coupling and crystalline anisotropy. The coercive field is calculated within the framework of micromagnetic continuum theory as well as with a discrete lattice theory which accounts for the interaction between the individual atomic spins. The theory has been applied to discuss the influence of grain boundaries and antiphase boundaries in the intermetallic compound Co5Sm.

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  1. H. R. Hilzinger

    Present address: Vacuumschmelze GmbH, D-6450, Hanau 1, Fed. Rep. Germany

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  1. Max-Planck-Institut für Metallforschung, Institut für Physik, D-7000, Stuttgart, Fed. Rep. Germany

    H. R. Hilzinger

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Hilzinger, H.R. The influence of planar defects on the coercive field of hard magnetic materials. Appl. Phys. 12, 253–260 (1977). https://doi.org/10.1007/BF00915199

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