Spin-electromagnetic waves in planar multiferroic multilayers
Spin-electromagnetic waves in planar multiferroic multilayers
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DOI：
10.1063/1.4990991
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发表时间：
2017-07
影响因子：
3.2
通讯作者：
A. Nikitin;A. Ustinov;V. Vitko;A. Nikitin;Alexandr V. Kondrahov;P. Pirro;E. Lähderanta;B. Kalinikos;B. Hillebrands
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文献类型：
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作者：
A. Nikitin;A. Ustinov;V. Vitko;A. Nikitin;Alexandr V. Kondrahov;P. Pirro;E. Lähderanta;B. Kalinikos;B. Hillebrands
建立了自旋电磁波在多铁性多层膜中传播色散特性的一般电动力学理论。推导是基于完整的麦克斯韦方程组考虑到延迟效应。多层膜被认为是由无限数量的铁氧体和铁电层具有任意的厚度，以及任意的磁和电参数。作为一个例子，SEW的光谱计算和分析的异质结构包含两个薄的铁氧体薄膜由一个薄的铁电薄膜分开。示出了在千兆赫频率的SEW色散特性的电场可调谐性，提供了对应用重要的SEW波数的有效控制。
A general electrodynamic theory is developed for dispersion characteristics of spin-electromagnetic waves (SEWs) propagating in multiferroic multilayers. The derivation is based on the full set of Maxwell's equations taking into account retardation effects. The multilayers are considered to be composed of an infinite number of ferrite and ferroelectric layers having arbitrary thicknesses, as well as arbitrary magnetic and electric parameters. As an example, spectra of SEWs are calculated and analyzed for a heterostructure containing two thin ferrite films separated by a thin ferroelectric film. An electric field tunability of the SEW dispersion characteristics at gigahertz frequencies is shown, providing an efficient control of SEW wave-numbers important for applications.