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首页> 外文期刊>Physical review >Element-specific depth profile of magnetism and stoichiometry at the La_(0.67)Sr_(0.33)MnO_3/BiFeO_3 interface
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Element-specific depth profile of magnetism and stoichiometry at the La_(0.67)Sr_(0.33)MnO_3/BiFeO_3 interface

机译:La_(0.67)Sr_(0.33)MnO_3 / BiFeO_3界面处的元素特定的磁性和化学计量深度分布

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摘要

Depth-sensitive magnetic, structural, and chemical characterization is important in the understanding and optimization of physical phenomena emerging at the interfaces of transition metal oxide heterostructures. In a simultaneous approach we have used polarized neutron and resonant x-ray reflectometry to determine the magnetic profile across atomically sharp interfaces of ferromagnetic La_(0.67)Sr_(0.33)MnO_3/multiferroic BiFeO_3 bilayers with subnanometer resolution. In particular, the x-ray resonant magnetic reflectivity measurements at the Fe and Mn resonance edges allowed us to determine the element-specific depth profile of the ferromagnetic moments in both the La_(0.67)Sr_(0.33)MnO_3 and BiFeO_3 layers. Our measurements indicate a magnetically diluted interface layer within the La_(0.67)Sr_(0.33)MnO_3 layer, in contrast to previous observations on inversely deposited layers [P. Yu et al., Phys. Rev. Lett. 105, 027201 (2010)]. Additional resonant x-ray reflection measurements indicate a region of altered Mn and O content at the interface, with a thickness matching that of the magnetic diluted layer, as the origin of the reduction of the magnetic moment.
机译:深度敏感的磁性,结构和化学表征对于理解和优化过渡金属氧化物异质结构界面处出现的物理现象很重要。在同时进行的方法中,我们使用极化中子和X射线共振反射法测定了亚纳米级分辨率的铁磁La_(0.67)Sr_(0.33)MnO_3 /多铁性BiFeO_3双层原子锐利界面上的磁分布。特别地,在Fe和Mn共振边缘的X射线共振磁反射率测量值使我们能够确定La_(0.67)Sr_(0.33)MnO_3和BiFeO_3层中铁磁矩的特定元素深度分布。我们的测量结果表明,La_(0.67)Sr_(0.33)MnO_3层中的磁稀释界面层与先前在反沉积层上的观察结果相反[P. Yu等,Phys。牧师105,027201(2010)]。附加的共振X射线反射测量结果表明,界面处Mn和O含量发生变化的区域,其厚度与磁稀释层的厚度匹配,这是磁矩减小的根源。

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  • 来源
    《Physical review》 |2014年第4期|041113.1-041113.5|共5页
  • 作者单位

    School of Physics, Universite of New South Wales, Sydney, NSW 2052, Australia,Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia;

    School of Physics, Universite of New South Wales, Sydney, NSW 2052, Australia,Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia;

    Institute for Materials Research, Helmholtz Zentrum Geesthacht, D-21502 Geesthacht, Germany;

    Canadian Neutron Beam Centre, Chalk River Laboratories, Ontario, Canada K0J 1J0;

    Max-Planck-Institute for Solid State Research, outstation FRM Ⅱ, D-70569 Stuttgart, Germany;

    Max-Planck-Institute for Solid State Research, outstation FRM Ⅱ, D-70569 Stuttgart, Germany;

    Max-Planck-Institute for Solid State Research, outstation FRM Ⅱ, D-70569 Stuttgart, Germany;

    Max-Planck-Institute for Intelligent Systems, D-70569 Stuttgart, Germany;

    Max-Planck-Institutefor Intelligent Systems, D-70569 Stuttgart, Germany;

    Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia;

    School of Physical, Environmental and Mathematical Sciences, Universite of New South Wales, Canberra, ACT 2600, Australia;

    SuperSTEM Laboratory, STFC Daresbury Campus, Keckwick Lane, Daresbury WA4 4AD, United Kingdom;

    School of Mathematics and Physics, Queen's Universite Belfast, Belfast BT7 1NN, United Kingdom;

    School of Materials Science and Engineering, Universite of New South Wales, Sydney, NSW 2052, Australia;

    School of Materials Science and Engineering, Universite of New South Wales, Sydney, NSW 2052, Australia;

    Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia,Department of Physics and Materials Science, City Universite of Hong Kong, Hong Kong SAR, China;

    School of Physics, Universite of New South Wales, Sydney, NSW 2052, Australia,Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetic properties of interfaces (multilayers, superlattices, heterostructures);

    机译:界面的磁性(多层;超晶格;异质结构);

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