Effects of a microwave voltage on magnetization precession are analyzed based on a macrospin model. The microwave voltage induces the oscillating anisotropy field through the voltage-controlled magnetic anisotropy (VCMA) effect, and then stimulates the magnetization. The large-angle precession is maintained if the magnetization synchronizes with the microwave voltage. The effective equations of motion of the magnetization with an oscillating anisotropy field are derived, and the mechanism of the synchronization is clarified by analyzing the derived equations of motion. The conditions of the angular frequency detuning and the amplitude of the oscillating anisotropy field for synchronization are obtained. The results are useful for development of VCMA-based energy-efficient spintronic devices using magnetization precession such as a VCMA-based magnetoresistive random-access memory and a nanoscale microwave magnetic field generator.

中文翻译：

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微波电压维持磁化的大角度进动

基于宏自旋模型分析了微波电压对磁化进动的影响。微波电压通过压控磁各向异性（VCMA）效应感应出振荡各向异性场，然后激发磁化强度。如果磁化强度与微波电压同步，则可以保持大角度进动。推导了具有各向异性振动场的磁化运动的有效方程，并通过分析推导的运动方程，阐明了同步机制。得到了角频率失谐的条件和用于同步的振荡各向异性场的幅度。