Voltage-Driven Magnetization Switching Controlled by Microwave Electric Field Pumping
Voltage-Driven Magnetization Switching Controlled by Microwave Electric Field Pumping
复制标题
微波电场泵浦控制的电压驱动磁化开关
DOI：
10.1021/acs.nanolett.0c02022
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发表时间：
2020
期刊：
影响因子：
10.8
通讯作者：
and S. Yuasa
中科院分区：
文献类型：
--
作者：
T. Yamamoto;T. Nozaki;H. Imamura;S. Tamaru;K. Yakushiji;H. Kubota;A. Fukushima;and S. Yuasa
研究了纳米磁体在微波电场泵浦下的动态开关特性。由微波电场泵浦引起的各向异性场的周期性调制有效地激发了均匀的磁化振荡，允许精确地控制磁化切换。泵浦电压波形的精确整形也使我们能够研究磁化对泵浦信号的相对相位差的瞬时反应。我们从实验和理论上证明了阿德角的存在，即即使微波频率本身满足参数激发条件，磁化强度的均匀振荡也被抑制。我们的结果为操纵纳米磁性器件中的超快磁化动力学提供了一种节能的方法。
We study the dynamic switching properties of a nanomagnet under microwave electric field pumping. The periodic modulation of an anisotropy field induced by microwave electric field pumping efficiently excites the uniform magnetization oscillation, allowing for precise control of magnetization switching. Accurate shaping of the pumping voltage waveform also enables us to investigate the transient reaction of magnetization to the relative phase difference of the pumping signal. We demonstrate both experimentally and theoretically the existence of adead anglein which the uniform oscillation of magnetization is inhibited even though the microwave frequency itself satisfies the conditions of parametric excitation. Our results provide an energy-efficient way of manipulating ultrafast magnetization dynamics in nanomagnetic devices.