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Long-wavelength magnetic and magnetoelectric excitations in the ferroelectric antiferromagnet BiFeO_3

机译:铁电反铁磁体BiFeO_3中的长波磁和磁电激发

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摘要

We present a terahertz spectroscopic study of magnetic excitations in ferroelectric antiferromagnet BiFeO_3. We interpret the observed spectrum of long-wavelength magnetic resonance modes in terms of the normal modes of the material's cycloidal antiferromagnetic structure. We find that the modulated Dzyaloshinski-Moriya interaction leads to a splitting of the out-of-plane resonance modes. We also assign one of the observed absorption lines to an electromagnon excitation that results from the magnetoelectric coupling between the ferroelectric polarization and the cycloidal magnetic structure of BiFeO_3.
机译:我们提出了铁电反铁磁体BiFeO_3中的磁激发的太赫兹光谱研究。我们根据材料的摆线反铁磁结构的正常模式来解释长波磁共振模式的观察光谱。我们发现调制的Dzyaloshinski-Moriya相互作用导致面外共振模式的分裂。我们还将观察到的吸收线之一分配给电磁子激发,这是由铁电极化和BiFeO_3的摆线磁结构之间的磁电耦合引起的。

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  • 来源
    《Physical review》 |2011年第9期|p.094403.1-094403.5|共5页
  • 作者单位

    Department of Chemistry, Yale University, PO Box 208107, New Haven, Connecticut 06520-8107, USA;

    Center for Integrated Nanotechnologies, MS K771, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA;

    Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Rd.,Piscataway, New Jersey 08854, USA;

    Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Rd.,Piscataway, New Jersey 08854, USA;

    Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Rd.,Piscataway, New Jersey 08854, USA;

    Center for Integrated Nanotechnologies, MS K771, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA;

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

    antiferromagnetics; elements; oxides; nitrides; borides; carbides; chalcogenides; etc;

    机译:反铁磁元素;氧化物氮化物硼化物碳化物;硫属元素化物;等等;

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