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Hard Magnetic Properties of Multilayered SmCo/Co Permanent Magnets

机译：多层smCo / Co永磁体的硬磁特性

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This report discusses the preparation of (SmCo)/Co multilayers with two different Co thicknesses to study the hard magnetic properties coercivity H and energy product BH(sub max) of nanostructured SmCo magnets consisting of hard SmCo and softer higher moment Co phases. Samples are annealed at a temperature in the range 450-700 deg C, for 20 minutes in vacuum (standard anneal) or rapidly annealed for 30 seconds under flowing nitrogen (rapid anneal) to form the hard Sm-Co phase. We find that samples subjected to a standard anneal at 500 deg C or a rapid anneal at 650 deg C show the largest energy products in these thin films, about 12 MG.Oe. This is closely related to the fact that the high field magnetization is highest for these anneal temperatures and decreases at higher anneal temperatures.

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