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Magnetoelectric domains and their switching mechanism in a F-type hexaferrite

机译:磁电域及其在F型六桥型中的开关机构

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摘要

By employing resonant x-ray microdiffraction, we image the magnetization and magnetic polarity domains of the Y-type hexaferrite Ba0.5Sr1.5Mg2Fe12O22. We show that the magnetic polarity domain structure can be controlled by both magnetic and electric fields and that full inversion of these domains can be achieved simply by reversal of an applied magnetic field in the absence of an electric field bias. Furthermore, we demonstrate that the diffraction intensity measured in different x-ray polarization channels cannot be reproduced by the accepted model for the polar magnetic structure, known as the 2-fan transverse conical (TC) model. We propose a modification to this model, which achieves good quantitative agreement with all of our data. We show that the deviations from the TC model are large and may be the result of an internal magnetic chirality, most likely inherited from the parent helical (nonpolar) phase.
机译:通过采用共振X射线微量微量缩合,我们将Y型六氧化物BA0.5SR1.5MG2FE12O22的磁化和磁极性结构域图像图像。我们表明,可以通过磁场和电场来控制磁极性畴结构,并且可以简单地通过在没有电场偏压的情况下的施加磁场的逆转来实现这些域的全部反转。此外,我们证明在不同X射线偏振通道中测量的衍射强度不能通过可接受的磁性结构的可接受的模型再现,称为2风扇横向锥形(TC)模型。我们向该模型提出了修改,这与我们的所有数据达成了良好的定量协议。我们表明,与TC模型的偏差很大,并且可能是内部磁性手性的结果,最可能从母螺旋(非极)相继承。

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  • 来源
    《Physical review》 |2019年第10期|104411.1-104411.13|共13页
  • 作者单位

    Univ Oxford Dept Phys Clarendon Lab Parks Rd Oxford OX1 3PU England;

    Univ Oxford Dept Phys Clarendon Lab Parks Rd Oxford OX1 3PU England;

    Diamond Light Source Harwell Sci & Innovat Campus Didcot OX11 0DE Oxon England;

    Univ Oxford Dept Phys Clarendon Lab Parks Rd Oxford OX1 3PU England;

    Diamond Light Source Harwell Sci & Innovat Campus Didcot OX11 0DE Oxon England;

    Univ Oxford Dept Phys Clarendon Lab Parks Rd Oxford OX1 3PU England;

    Univ Oxford Dept Phys Clarendon Lab Parks Rd Oxford OX1 3PU England;

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