Magnetic anisotropy constants of ThMn12-type Sm(Fe1– xCox)12 compounds and their temperature dependence

D. Ogawa, T. Yoshioka, X. D. Xu, Y. K. Takahashi, H. Tsuchiura, T. Ohkubo, S. Hirosawa, K. Hono

研究成果: Article査読

16 被引用数 (Scopus)


The first and second-order uniaxial magnetic anisotropy constants K1 and K2 of the Sm(Fe1– xCox)12 compounds and their temperature dependence are determined by the torque magnetometry technique using the anomalous Hall effect (AHE) on epitaxially grown Sm(Fe1- xCox)12 thin films. While K1 monotonically decreases with increasing temperature regardless of the Co concentration, K2 changes its sign from negative to positive with increasing temperature and reaches a maximum at 250 K. These observations are consistent with the hard-axis magnetization curves at low temperature that show an upward deviation from a linear extrapolation of the low field part. Ab-initio estimations of the crystal field parameters at the Sm site using a spin model of Sm(Fe1– xCox)12 compounds and theoretical analysis of magnetocrystalline anisotropy of Sm3+ ions taking the multiple J-mixing into account explain these main features of the experimental results.

ジャーナルJournal of Magnetism and Magnetic Materials
出版ステータスPublished - 2020 3 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


「Magnetic anisotropy constants of ThMn<sub>12</sub>-type Sm(Fe<sub>1–</sub> <sub>x</sub>Co<sub>x</sub>)<sub>12</sub> compounds and their temperature dependence」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。