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首页> 外文期刊>Physical review >Resonant x-ray magnetoelectric effect in a centrosymmetric spinel oxide
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Resonant x-ray magnetoelectric effect in a centrosymmetric spinel oxide

机译：中心对称尖晶石氧化物中的共振X射线磁电效应

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摘要

We show clear evidence that the local magnetoelectric (ME) effect arising from the noncentrosymmetric magnetic sites can be element-specifically detected by using the resonant x-ray ME scattering (XMES), even in systems where the space-inversion (I) or the time-reversal (R) symmetry is globally restored. At the (222) reflection in a centrosymmetric spinel oxide MnCr_2O_4, where the conventional Mn-resonant x-ray magnetic scattering is forbidden, we have observed a resonant magnetic signal at the intra-atomic ls-3d absoiption edge of Mn ions on tetrahedral sites, which is uniquely attributed to the XMES. This unique x-ray scattering is caused by a transfer of the spectral weight between the electric dipole (E1) and electric quadrupole (E2) transitions through the spin-orbit coupling. The possibility of the important application utilizing the ME scattering technique is discussed as well.
机译：我们显示出明确的证据，即使使用空间反演（I）或共振的系统，也可以通过使用共振x射线ME散射（XMES）来特定于元素地检测到由非中心对称磁性位点引起的局部磁电（ME）效应。时间反转（R）对称性已全局恢复。在中心对称的尖晶石型氧化物MnCr_2O_4的（222）反射处，其中常规的Mn共振x射线磁散射被禁止，我们在四面体位点上的Mn离子的原子内ls-3d吸收边缘观察到了共振磁信号。 ，这是XMES的唯一属性。这种独特的X射线散射是通过自旋轨道耦合在电偶极子（E1）和四极子（E2）跃迁之间传递光谱权重引起的。还讨论了利用ME散射技术进行重要应用的可能性。

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  • 来源
    《Physical review》 |2009年第18期|180407.1-180407.4|共4页
  • 作者

    M. Matsubara; Y. Shimada; K. Ohgushi; T. Arima; Y. Tokura;

  • 作者单位

    National Institute of Advanced Industrial Science and Technology (AIST), Tsuhtba 305-8562, Japan CREST Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan;

    Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan;

    Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan;

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan;

    National Institute of Advanced Industrial Science and Technology (AIST), Tsuhtba 305-8562, Japan Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan Multiferroics Project, ERATO, Japan Science and Technology Agency (JST), AS1, RIKEN, Wako 351-0198, Japan;

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  • 正文语种 eng
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  • 关键词

    magnetomechanical and magnetoelectric effects; magnetostriction; ferrimagnetics; X-ray scattering;

    机译：磁机械和磁电效应;磁致伸缩亚铁磁;X射线散射;

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