Nonlinear Dynamics of an Antiferromagnetic Spintronic Oscillator

被引：0
作者：
A. R. Safin
S. A. Nikitov
机构：
[1] Moscow Energy Institute,
[2] V. A. Kotel’nikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences,undefined
来源：
Radiophysics and Quantum Electronics | 2019年 / 61卷
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摘要：
We study nonlinear dynamics of the spintronic nanosized antiferromagnetic terahertz oscillator consisting of an antiferromagnetic layer with easy-plane anisotropy (hematite) and a normal-metal (platinum) layer. Normal oscillation frequencies, namely, ferromagnetic and antiferromagnetic (terahertz) ones, are found. Their dependence on the value of a static magnetic field parallel to the sample plane is obtained. An approximate mathematical model in the form of the equations for the Néel-vector rotation angle in the azimuthal plane is developed for describing the oscillator dynamics. The adjustment characteristic, i.e., the dependence of the antiferromagnetic-mode frequency on the value of the direct current flowing in the platinum layer is obtained.
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页码：834 / 840
页数：6
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