Spin-Current-Driven Permeability Variation for Time-Varying Magnetic Metamaterials
Spin-Current-Driven Permeability Variation for Time-Varying Magnetic Metamaterials
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自旋电流驱动时变磁性超材料的磁导率变化
DOI：
10.1103/physrevapplied.19.044080
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发表时间：
2023
影响因子：
4.6
通讯作者：
Tomita Satoshi
中科院分区：
文献类型：
--
作者：
Kodama Toshiyuki;Kikuchi Nobuaki;Okamoto Satoshi;Ohno Seigo;Tomita Satoshi
我们用自旋扭矩铁磁共振(STFMR)方法研究了由/Py/三层膜组成的光刻磁性准原子的磁导率()变化。当注入高达1 GHz的直流电和GHz频率的交流电时，由于大量的自旋电流注入，外磁场下的准原子显示出显著的ST FMR信号的位置和宽度的变化。这导致了自旋电流驱动的变化，并根据实验获得的共振场和Gilbert阻尼参数进行了解析计算，证实了这一点。本研究为实现后第五代移动通信系统微波源的高调制频率的时变自旋电子超材料铺平了道路。
We study permeability () variation of a lithographically prepared magnetic meta-atom consisting of/Py/trilayers by means of spin-torque ferromagnetic resonance (ST FMR). With an injection of a direct current up totogether with an alternating current in GHz frequencies, the meta-atom under external magnetic fields shows significant changes in position and width of ST FMR signals due to a massive spin-current injection. This leads to the spin-current-drivenvariation, which is verified by analytical calculation based upon the experimentally obtained resonance field and Gilbert-damping parameter. The present study paves a way to time-varying spintronic metamaterials with a high modulation frequency for realizing microwave sources toward the post-fifth-generation mobile-communication system.
影响因子：
4.6
作者：
Huang Y;Nakamura K;Takida Y;Minamide H;Hane K;Kanamori Y
通讯作者：
Kanamori Y
Co/Pt超晶格超材料的频域微波光谱
DOI：
--
发表时间：
2021
期刊：
影响因子：
--
作者：
Satoshi Tomita;Nobuaki Kikuchi;Masatoshi Hatayama;Satoshi Okamoto
通讯作者：
Satoshi Okamoto