Abstract
Spin-reorientation-transition cell boundary phases are used to improve the temperature stability of coercivity in 2:17 type SmCo magnets. A magnet with both low temperature coefficients of remanence (α) and coercivity (β) is developed. In comparison with traditional 2:17 type SmCo magnets with low temperature coefficient of remanence, this magnet exhibits comparable (BH)max and α, meanwhile the β(20–100 °C) is improved by more than two orders of magnitude. The comparative study of reversible magnetization/irreversible magnetizations indicates that the flux losses of this magnet are barely affected by temperature, which is an remarkable improvement in developing temperature-stable magnet.
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