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首页> 外文期刊>Physical review >Electrical tuning of skyrmion dynamics in multiferroic composite thin films
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Electrical tuning of skyrmion dynamics in multiferroic composite thin films

机译：多体型复合薄膜中斯基云动力学的电子调整

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摘要

A lack of space-inversion symmetry along with broken time-reversal symmetry at ferromagnetic/ferroelectric interfaces gives rise to the electric field control of the effective magnetic field and the Dzyaloshinskii-Moriya interaction, thus allowing for the formation of multiferroic skyrmions at room temperature. The electric-fielddriven evolution of spin textures at the ferromagnetic/ferroelectric interface is investigated by means of Monte Carlo simulations. It is demonstrated that the skyrmion lattice can be stabilized by the moderate interfacial magnetoelectric couplings. The chirality, radius, position, and numbers of skyrmions are found to be tunable by an external the electric field. The nonequilibrium dynamics of skyrmions, however, strongly depends on the frequency of the applied time-oscillating electric field. With the increase of the frequency of the ac electric field, multiferroic skyrmions become unstable and after several periods they are, ultimately, damping down to the helimagnetic phase. Under microwavelike electric fields, the dynamic multiferroic response of the skyrmion lattice is anisotropic and inhomogeneous. The electric-field-induced resonance spectrum of the magnetic skyrmion with a distinct peak in the imaginary part of permeability is successfully simulated by the Fourier transformation of magnetization.
机译：在铁磁/铁电界面处缺乏空间反转对称性以及破裂的时间反转对称性产生有效磁场和Dzyaloshinskii-moriya相互作用的电场控制，从而允许在室温下形成多体臭氧。通过Monte Carlo模拟研究了铁磁/铁电界面处的旋转纹理的电动驱动的进化。证明Skyrmion格子可以通过中等界面磁电联轴器稳定。发现臭鼬的手性，半径，位置和数量被外部电场可调。然而，Skyrmions的非纤细动态强烈取决于所施加的时振电场的频率。随着AC电场频率的增加，多体子臭氧层变得不稳定，经过几个时段，最终，抑制到直升机阶段。在微量控制电场下，Skyrmion晶格的动态多体响应是各向异性和不均匀的。通过磁化的傅里叶变换成功地模拟了在虚部的虚构部分中具有不同峰的电场诱导的磁性阶段的共振光谱。

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  • 来源
    《Physical review》 |2019年第10期|104410.1-104410.6|共6页
  • 作者

    Yu Dongxing; Luo Shutian; Li Yaojin; Koval Vladimir; Jia Chenglong;

  • 作者单位

    Lanzhou Univ MOE Key Lab Magnetism & Magnet Mat Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ MOE Key Lab Magnetism & Magnet Mat Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ MOE Key Lab Magnetism & Magnet Mat Lanzhou 730000 Gansu Peoples R China;

    Slovak Acad Sci Inst Mat Res Watsonova 47 Kosice 04001 Slovakia;

    Lanzhou Univ MOE Key Lab Magnetism & Magnet Mat Lanzhou 730000 Gansu Peoples R China|Martin Luther Univ Halle Wittenberg Inst Phys D-06099 Halle Saale Germany;

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