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首页> 外文期刊>IEEE Transactions on Magnetics >Quadratic Magneto-Optic Kerr Effect Investigations of Fe(100) Grown on Ir(100)
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Quadratic Magneto-Optic Kerr Effect Investigations of Fe(100) Grown on Ir(100)

机译:在Ir(100)上生长的Fe(100)的二次磁光Kerr效应研究

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摘要

Magneto-optic Kerr effect (MOKE) is a widely used tool in surface physics to characterize magnetic thin films and single crystals. Inmost of its applications, the magneto-optic (MO) coupling is assumed to be linear on magnetization by neglecting the quadratic and higher dependences. However, recent observations have shown that the quadratic dependence cannot be always ignored, particularly in systems like ferromagnetic metal thin films, Heusler alloys, and even in half-metallic ferrimagnets. We have used a rotating field method to extract the QMOKE signal from Fe(100) film grown on (100) surface of a single crystal iridium. Our results show that the QMOKE signal from this system is comparable to the linear MOKE signal. We report the parameters L, b, and c which relate the linear (K) and quadratic (G and AG) MO coupling coefficients. The real part of L, b, and c obtained from Fe(100)/Ir(100) are -9.75 ± 0.03 mdeg, 7.28 ± 0.09 mdeg, and -5.0 ± 0.1 mdeg, respectively.
机译:磁光克尔效应(MOKE)是表面物理学中广泛使用的工具,用于表征磁性薄膜和单晶。在大多数应用中,通过忽略二次和更高的相关性,可以假定磁光(MO)耦合在磁化强度上是线性的。但是,最近的观察表明,二次依赖性不能总是被忽略,特别是在铁磁金属薄膜,赫斯勒合金甚至半金属铁氧体中。我们已经使用旋转场方法从单晶铱的(100)表面上生长的Fe(100)膜中提取QMOKE信号。我们的结果表明,来自该系统的QMOKE信号与线性MOKE信号相当。我们报告了参数L,b和c,它们与线性(K)和二次(G和AG)MO耦合系数有关。从Fe(100)/ Ir(100)获得的L,b和c的实部分别为-9.75±0.03 mdeg,7.28±0.09 mdeg和-5.0±0.1 mdeg。

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