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Electric-field induced nonlinear ferromagnetic resonance in a CoFeB/MgO magnetic tunnel junction

机译：CoFeB / MgO磁性隧道结中的电场感应非线性铁磁共振

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摘要

We investigate the rf power dependence of homodyne-detected ferromagnetic resonance (FMR) spectra of a nanoscale CoFeB/MgO magnetic tunnel junction, in which the FMR is induced by the electric-field modulation of the magnetic anisotropy. The increase of the rf power changes the spectral lineshape and decreases characteristic frequency, at which drastic change in spectrum is observed. The behavior is consistent with nonlinear magnetization precession with a large preces-sional angle at high powers. From the rf power dependence of FMR spectra, we determine electric-field modulation ratio of magnetic anisotropy energy density to be 78 fJ/Vm, which is in agreement with the reported values.
机译：我们研究了纳米级CoFeB / MgO磁性隧道结的零差检测铁磁共振（FMR）谱的射频功率依赖性，其中FMR是由磁场各向异性的电场调制引起的。射频功率的增加改变了谱线的形状，并降低了特征频率，在此观察到光谱的急剧变化。该行为与大功率时大角度角的非线性磁化进动一致。从FMR频谱的射频功率依赖性，我们确定磁场各向异性能量密度的电场调制比为78 fJ / Vm，与报道的值一致。

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  • 来源
    《Applied Physics Letters》 |2015年第13期|132404.1-132404.4|共4页
  • 作者

    E. Hirayama; S. Kanai; J. Ohe; H. Sato; F. Matsukura; H. Ohno;

  • 作者单位

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan,Center for Spintronics Integrated Systems, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;

    Department of Physics, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan;

    Center for Spintronics Integrated Systems, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan,Center for Innovative Integrated Electronic Systems, Tohoku University, 468-1 Aramaki Aza Aoba, Aoba-ku, Sendai 980-0845, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan,Center for Spintronics Integrated Systems, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan,WPI-Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;

    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan,Center for Spintronics Integrated Systems, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan,Center for Innovative Integrated Electronic Systems, Tohoku University, 468-1 Aramaki Aza Aoba, Aoba-ku, Sendai 980-0845, Japan,WPI-Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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  • 入库时间 2022-08-18 03:15:20

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