...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Investigation of the electromagnon excitations in the multiferroic TbMn_2O_5
【24h】

Investigation of the electromagnon excitations in the multiferroic TbMn_2O_5

机译：多铁性TbMn_2O_5中的电磁子激发研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Multiferroic materials in which magnetism and ferroelectricity coexist are a time-honored subject of study, opening the route for the next generation of electronic devices. Understanding the pronounced interplay between these properties is a current challenge, especially for the realization of multiferroic devices. One of the largest reversible magnetoelectric couplings has been evidenced in TbMn_2O_5, the reference compound of the so-called RMn_2O_5 multiferroics. The origin of this strong coupling has been intensively studied from the static properties. Here we report an inelastic neutron scattering investigation of the dynamic properties in this famous compound. Our work sheds light on the electromagnon, a hybrid mode theoretically predicted in multiferroics, which couples magnetic excitations with polar lattice degrees of freedom. We were able to determine in TbMn_2O_5 the exchange constants of a model Heisenberg Hamiltonian and to identify the spin excitation that transforms in the electromagnon on passing from the ferroelectric and magnetically collinear phase to the low temperature incommensurate and weakly ferroelectric one. Our results point to the unusual feature of the dynamic magnetoelectric coupling in this series of multiferroics.
机译：磁性和铁电共存的多铁材料已成为历史悠久的研究主题，这为下一代电子设备开辟了道路。理解这些特性之间明显的相互作用是当前的挑战，特别是对于多铁性器件的实现而言。最大的可逆磁电耦合之一已在TbMn_2O_5中得到证明，TbMn_2O_5是所谓的RMn_2O_5多铁化合物的参考化合物。已经从静态特性深入研究了这种强耦合的起源。在这里，我们报告了这种著名化合物动力学特性的非弹性中子散射研究。我们的工作为电磁铁提供了亮光，电磁铁是一种理论上在多铁性中预测的混合模式，它将磁激励与极点晶格自由度耦合。我们能够在TbMn_2O_5中确定模型海森堡哈密顿量的交换常数，并确定自铁磁和磁共线相转变为低温，不相称且弱铁电的相时，在电磁子中转变的自旋激发。我们的结果指出了这一系列多铁性材料中动态磁电耦合的不寻常特征。

著录项

  • 来源
    《Physical review》 |2013年第14期|140301.1-140301.5|共5页
  • 作者

    S. Petit; V. Baledent; C. Doubrovsky; M. B. Lepetit; M. Greenblatt; B. Wanklyn; P. Foury-Leylekian;

  • 作者单位

    Laboratoire Leon Brillouin, CEA-CNRS UMR12, 91191 Gif-sur-Yvette Cedex, France;

    Laboratoire de Physique des Solides, Universite Paris-Sud, CNRS-UMR 8502, 91405 Orsay Cedex, France;

    Laboratoire de Physique des Solides, Universite Paris-Sud, CNRS-UMR 8502, 91405 Orsay Cedex, France;

    Institut Neel, 38042 Grenoble, France,Institut Laue Langevin, 38042 Grenoble, France;

    Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA;

    Clarendon Laboratory, Oxford University, Oxford, England;

    Laboratoire de Physique des Solides, Universite Paris-Sud, CNRS-UMR 8502, 91405 Orsay Cedex, France;

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

    phonons in crystal lattices; charge-density-wave systems; neutron inelastic scattering;

    机译：晶格中的声子;电荷密度波系统;中子非弹性散射;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号