|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Science for High-Performance Permanent Magnets
||Theoretical Study on the Temperature Dependence of Magnetic Anisotropy Constants of Rare Earth Permanent Magnets
||Akimasa Sakuma, Daisuke Miura, Yuta Toga
|On-Site Speaker (Planned)
For permanent magnets, magnetic anisotropy is the most important property because of its close connection with the coercivity. Recent development of electric vehicles stimulates much interest in the temperature dependence of this property of magnets especially above room temperatures where the motors operate. In this symposium, we will first overview the general theory for the magnetic anisotropy at finite temperature and show how the magnetic anisotropy constants (MAC) vary as temperature increases. Next, we will show some calculated results for the temperature dependence of MAC of Nd2Fe14B using the constrained Monte Carlo method . Here we mainly discuss the effects of exchange field on the MAC and the site dependence of the MAC’s at around the room temperature.
References:  P. Asselin, et al., Phys. Rev. B 82, 054415 (2010).