Probing temperature-driven spin reorientation transition of GdFeCo film by Kerr loops and ferromagnetic resonance
Probing temperature-driven spin reorientation transition of GdFeCo film by Kerr loops and ferromagnetic resonance
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通过克尔环和铁磁共振探测 GdFeCo 薄膜温度驱动的自旋重定向转变
DOI：
10.1063/1.4906871
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发表时间：
2015-01-26
影响因子：
4
通讯作者：
Cheng, Zhao-Hua
中科院分区：
文献类型：
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作者：
He, Wei;Liu, Hao-Liang;Cheng, Zhao-Hua
磁光材料GdFeCo薄膜的磁各向异性具有重要的科学和技术意义。我们通过克尔环和铁磁共振表征了20 nm GdFeCo薄膜从265 K到320 K的磁各向异性。随着温度的升高，一阶单轴磁各向异性和形状各向异性均增大。然而，它们之间的竞争导致了温度驱动的自旋重取向转变（SRT），有效垂直磁各向异性从2.22 × 104 ergs/cm 3（288 K）下降到−1.56 × 104 ergs/cm 3（317 K）。正的二阶单轴磁各向异性决定了SRT过程中易锥态作为介导态。
The magnetic anisotropy is of both scientific and technological interest for magneto-optical material GdFeCo film. We characterize the magnetic anisotropy of a 20 nm GdFeCo film from 265 K to 320 K via Kerr loops and ferromagnetic resonance. With increasing temperature, both of the first-order uniaxial magnetic anisotropy and shape anisotropy increase. However, the competition between them causes a temperature-driven spin reorientation transition (SRT) and the effective perpendicular magnetic anisotropy decrease from 2.22 × 104 ergs/cm3 (288 K) to −1.56 × 104 ergs/cm3 (317 K). The positive second-order uniaxial magnetic anisotropy determines an easy-cone state as the mediated state during SRT.