TY - JOUR
T1 - Magnetic anisotropy around grain-boundaries in rare-earth magnets and their coercivity
AU - Yoshioka, Takuya
AU - Tsuchiura, Hiroki
N1 - Publisher Copyright:
© 2016 The Japan Institute of Metals and Materials.
PY - 2017
Y1 - 2017
N2 - Recently, several experimental studies for sintered Nd-Fe-B magnets have shown that their coercivity can be decisively affected by atomic structures around the grain boundaries in the magnets. In this article, a theoretical review is given on possible coercivity reduction mechanisms in sintered Nd-Fe-B or rare-earth based permanent magnets by focusing on the anomalous local magnetic anisotropy found for Nd ions on interfacial structures, based on first-principles calculations and an effective spin model.
AB - Recently, several experimental studies for sintered Nd-Fe-B magnets have shown that their coercivity can be decisively affected by atomic structures around the grain boundaries in the magnets. In this article, a theoretical review is given on possible coercivity reduction mechanisms in sintered Nd-Fe-B or rare-earth based permanent magnets by focusing on the anomalous local magnetic anisotropy found for Nd ions on interfacial structures, based on first-principles calculations and an effective spin model.
KW - Coercivity
KW - Crystal field theory
KW - First-principles calculation
KW - Magnetic anisotropy
KW - Micromagnetic simulati
KW - Neodymium-iron-boron
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U2 - 10.2320/jinstmet.JA201604
DO - 10.2320/jinstmet.JA201604
M3 - Review article
AN - SCOPUS:85008227673
SN - 0021-4876
VL - 81
SP - 19
EP - 25
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
IS - 1
ER -