论文标题
通过微波电压维持的磁化的大角度进攻
Large angle precession of magnetization maintained by a microwave voltage
论文作者
论文摘要
基于宏生模型，分析了微波电压对磁化强化进动的影响。微波电压通过电压控制的磁各向异性（VCMA）效应诱导振荡各向异性场，然后刺激磁化强度。如果磁化强度与微波电压同步，则保持大角度进液。磁化具有振荡各向异性场的有效运动方程是得出的，并通过分析派生的运动方程来阐明同步的机理。获得了角频频率引起的条件和用于同步的振荡各向异性场的幅度。该结果对于使用磁化强度进动（例如基于VCMA的磁磁性随机访问记忆和纳米级微波磁场发生器）的磁化进动对于开发基于VCMA的节能旋转器设备很有用。
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 the VCMA-based energy-efficient spintronics devices using magnetization precession such as a VCMA-based magnetoresistive random access memory and a nano-scale microwave magnetic field generator.
