Fe based hard magnetic alloy having super-cooled liquid region
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United States of America Patent
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Aug 28, 2001
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app pub date -
Mar 25, 1998
filing date -
Mar 25, 1997
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Abstract
The present invention provides a Fe based hard magnetic alloy having a very wide temperature interval in the super-cooled liquid region, having a hard magnetism at room temperature, being able to be produced thicker than amorphous alloy thin films obtained by conventional liquid quenching methods, and having a high material strength, wherein the Fe based hard magnetic alloy comprises Fe as a major component and containing one or a plurality of elements R selected from rare earth elements, one or a plurality of elements M selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Cu, and B, the temperature interval .DELTA. T.sub.x in the super-cooled liquid region represented by the formula of .DELTA. T.sub.x =T.sub.x -T.sub.g (wherein T.sub.x and T.sub.g denote a crystallization initiation temperature and glass transition temperature, respectively) being 20.degree. C. or more.
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