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홍순철(Soon Cheol Hong),엇후(Dorj Odkhuu) 한국자기학회 2019 韓國磁氣學會誌 Vol.29 No.4
Since Nd₂Fe<SUB>14</SUB>B permanent magnet was developed in 1982, a new permanent magnet with higher performance than Nd2Fe14B has not been reported yet. On the other hand, new permanent magnet materials, which do not include rare-earth elements but are competible to ferrites in price, also are needed to be searched urgently. In this paper, we will review required material properties for good permanent magnets and discuss ways to search new permanent magnets, using first principles calculations. The goal to search the new permanent magnets should be set to find materials to have higher performance than Nd₂Fe<SUB>14</SUB>B or to be consisted of 3d transition metal as magnetic elements with compatible performance to Nd₂Fe<SUB>14</SUB>B to replace high performance rare-earth magnets or cheap ferrites.