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Magnetic structure of epitaxial multiferroic BiFeO_3 films with engineered ferroelectric domains

机译:具有工程铁电畴的外延多铁性BiFeO_3薄膜的磁性结构

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摘要

We report on neutron scattering and piezoresponse force microscopy studies of multiferroic SrFeO_3 films epitaxially grown on vicinal SrTiO_3 substrates. We find that these SrFeO_3 films exhibit a G-type antiferromag-netic structure modulated with cycloidal spiral magnetic ordering with the features of magnetic domains depending upon the ferroelectric domain states: a single antiferfomagnetic domain for the films with a ferroelectric monodomain while two- or multiantiferromagnetic domains existing in the films displaying two- or four-ferroelectric variants, respectively. These results imply the correlation between ferroelectric and magnetic order parameters in the SrFeO_3 films and the expected strong magnetoelectric coupling makes these multiferroic films promising candidates for device applications with the capability to tune the magnetism using an electric field.
机译:我们报告中子散射SrTiO_3衬底上外延生长的多铁性SrFeO_3膜的中子散射和压电响应力显微镜研究。我们发现,这些SrFeO_3膜表现出G型反铁磁结构,该结构通过摆线螺旋磁序进行调制,磁畴的特征取决于铁电畴状态:具有铁电单畴的膜具有一个反铁磁畴,而两个或多个反铁磁电影中分别存在两个或四个铁电变体的磁畴。这些结果表明,SrFeO_3薄膜中铁电和磁序参数之间具有相关性,并且预期的强磁电耦合使这些多铁磁薄膜有望成为器件应用的候选者,并具有利用电场调节磁性的能力。

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  • 来源
    《Physical review》 |2010年第13期|p.134448.1-134448.5|共5页
  • 作者单位

    Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;

    rnDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA;

    rnDepartment of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA;

    rnAmes Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    rnAmes Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    rnDepartment of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetic properties of thin films; surfaces; and interfaces;

    机译:薄膜的磁性表面;和接口;

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