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Orbital magnetic moments in SrRuO_3 epitaxial thin films with interfacially controlled magnetic anisotropy

机译：具有界面受控磁各向异性的SrRuO_3外延薄膜中的轨道磁矩

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摘要

Using x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) spectroscopy, we evaluated the orbital magnetic moments of itinerant ferromagnet SrRuO_3 (SRO) epitaxial thin films with interfacially controlled magnetic anisotropy. We found that the orbital moment is closely correlated with the SRO's magnetic anisotropy, which can be controlled by interfacially engineering the RuO_6 octahedral rotations. For the monoclinic film with magnetization along the direction 45° from the out-of-plane direction, the orbital moment is ≈ - 0.1 μB along the magnetic easy axis direction and is aligned antiparallel to the direction of the spin magnetic moments. For the tetragonal film with in-plane magnetization, on the other hand, the out-of-plane component of the orbital moment is as small as ≈ - 0.4 μ_B/Ru, accounting for the film's in-plane magnetic anisotropy. Our results highlight that the magnetic anisotropy of SRO can be controlled by engineering the orbital magnetic moment through the octahedral distortions.
机译：使用X射线吸收光谱（XAS）和X射线磁性圆二色性（XMCD）光谱，我们评估了具有界面受控磁各向异性的流动性铁磁体SrRuO_3（SRO）外延薄膜的轨道磁矩。我们发现，轨道力矩与SRO的磁各向异性密切相关，这可以通过界面工程RuO_6八面体旋转来控制。对于从平面外方向沿45°方向磁化的单斜膜，沿磁易轴方向的轨道力矩约为≈-0.1μB，并且与自旋磁矩的方向反平行排列。另一方面，对于具有平面内磁化的四方膜，轨道矩的平面外分量小至≈-0.4μ_B/ Ru，这解释了膜的平面内磁各向异性。我们的结果表明，可以通过设计八面体畸变的轨道磁矩来控制SRO的磁各向异性。

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  • 来源
    《Physical review》 |2016年第21期|214420.1-214420.5|共5页
  • 作者

    Daisuke Kan; Masaichiro Mizumaki; Tomoe Nishimura; Yuichi Shimakawa;

  • 作者单位

    Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan;

    Japan Synchrotron Radiation Research Institute, SPring-8, Sayo, Hyogo 679-5198, Japan;

    Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan;

    Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan,Integrated Research Consortium on Chemical Sciences, Uji, Kyoto 611-0011, Japan;

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