摘要
I. INTRODUCTION In 1983, Sagawa et al. found the excellent permanent magnet material with energy product up to 36 MGOe.At present the magnet with energy product higher than 47 MGOe has already been got. The appearance of this new type of permanent magnet material has aroused great scientific and technological interest. Recently the researches on rare earth-transition metal-metalloid ternary alloys and compounds have become very active.
