Influence of magnetoelectric coupling on electric field induced magnetization reversal in a composite unstrained multiferroic chain
Influence of magnetoelectric coupling on electric field induced magnetization reversal in a composite unstrained multiferroic chain
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DOI：
10.1103/physrevb.85.054401
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发表时间：
2012-02-01
影响因子：
3.7
通讯作者：
Berakdar, Jamal
中科院分区：
文献类型：
--
作者：
Horley, Paul P.;Sukhov, Alexander;Berakdar, Jamal
从理论上研究了BaTiO_3与铁链多铁耦合的一维复合系统中的多铁动力学。该方法将磁化强度和极化处理为热力学参数，可通过Landau-Lifshits-Gilbert和Ginzburg-Landau动力学的组合来描述，通过在总自由能密度中增加一项来描述。这一术语源于界面上的多铁性相互作用。在较宽的耦合强度范围内，我们预测了在外加电场的作用下，在系统的铁磁部分获得良好磁滞的可能性。我们还研究了反转模式与电场频率的关系，并预测在0.5-12 GHz频率范围内磁化反转具有相当大的稳定性。
We study theoretically the multiferroic dynamics in a composite one-dimensional system consisting of BaTiO3 multiferroically coupled to an iron chain. The method treats magnetization and polarization as thermodynamic quantities describable via a combination of the Landau-Lifshits-Gilbert and the Ginzburg-Landau dynamics coupled via an additional term in the total free energy density. This term stems from the multiferroic interaction at the interface. For a wide range of strengths of this coupling, we predict the possibility of obtaining a well-developed hysteresis in the ferromagnetic part of the system induced by an external electric field. The dependence of the reversal modes on the electric field frequency is also investigated and we predict a considerable stability of the magnetization reversal for frequencies in the range of 0.5-12 GHz.