Abstract

Recently, high-performance permanent magnets based on RE-TM-Z intermetallice (RE rare earth, TM: transition metal and Z light element) have been developed. One of their characteristic properties, the high energy product, could be performed by the high remanence and high coercive force. The mechanism of high saturation magnetization connected with high remanence has been well known from many fundamental studies, but the mechanism of coercive force is little known yet. In general, the coercive force H. has been denoted as follows [1]:

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