The exchange-spring magnet: a new material principle for permanent magnets
作者： E.F. Kneller , R. Hawig
DOI: 10.1109/20.102931
关键词: Remanence 、 Exchange spring magnet 、 Coercivity 、 Condensed matter physics 、 Saturation (magnetic) 、 Magnet 、 Magnetic hysteresis 、 Demagnetizing field 、 Materials science 、 Ferromagnetism
摘要: It is proposed that permanent magnets can be made of composite materials consisting of two suitably dispersed ferromagnetic and mutually exchange-coupled phases, one of which is hard magnetic in order to provide a high coercive field, while the other may be soft magnetic, just providing a high saturation J/sub s/, and should envelop the hard phase regions in order to prevent their corrosion. A general theoretical treatment of such systems shows that one may expect, besides a high energy product (BH)/sub max/, a reversible demagnetization …
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