|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Science for High-Performance Permanent Magnets
||Temperature Dependence of the Magnetization and Magnetic Anisotropy Measured on the Epitaxial RFe12 (-Nx) (R = Sm and Nd) Thin Films with ThMn12 Structure
||Yusuke Hirayama, Yukiko K. Takahshi, Satoshi Hirosawa, Kazuhiro Hono
|On-Site Speaker (Planned)
We have prepared NdFe<SUB>12</SUB> and SmFe<SUB>12</SUB> epitaxial films and their nitrides without a structure stabilized element by using a co-sputtering system in order to evaluate their temperature dependence of the magnetic properties. By nitriding, the Curie temperature was increased by more than 200°C for both NdFe<SUB>12</SUB> and SmFe<SUB>12</SUB> films. The saturation magnetization of 1.66 T and 1.58 T at room temperature were obtained for NdFe<SUB>12</SUB>N<SUB><I>x</I></SUB>  and SmFe<SUB>12</SUB>, respectively, with the uniaxial anisotropy in the out of plane direction which corresponds to the <I>c</I>-axis of the ThMn<SUB>12</SUB> structure, supporting the first principal calculations [2,3]. We also present the temperature dependence of the magnetization and magnetic anisotropy and discuss the results in terms of the classical molecular field picture. Y. Hirayama et. al., Scripta Materialia. 95(2015)70. Y. Harashima et. al., JPS Conf. Proc. 5(2015) 011021. W. Körner et al., Scientific Reports 6 (2016)24686.