EXCHANGE SPRING MAGNET AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide an exchange spring magnet having a uniform composite nanostructure and excellent coercive force and residual magnetic flux density, and to provide a manufacturing method therefor.

SOLUTION: The exchange spring magnet includes core/shell particles each with a particle size of 10-100 nm which each have an Fe nanoparticle with a predetermined particle diameter, an Sm-Co phase composed of SmCo5and provided around the Fe nanoparticle, and a nonmagnetic film provided around the Sm-Co phase. The exchange spring magnet has a composite structure of the core/shell particles.

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