A new discovery has been made in the field of magnetic materials that manifests itself in the form of a displaced hysteresis loop. In addition, although from the same basic phenomena, the magnetic material has only one stable orientation in a magnetic field. In particular, it can be turned through 180/spl deg/ and it will still return to its original orientation. The material that exhibits this property is a compact of fine particles of cobalt (100-1000 /spl Aring/) that have a cobaltous oxide coating.
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Meiklejohn et al. (2001) studied this question.
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