Frequency-dependent magnetization response of CoFe thin film

ORAL

Abstract

Frequency-dependent magnetization dynamics in CoFe thin films is investigated. Magnetization has been generated and detected by a pair of micrometer-wide antennas. The experimental data have been mapped showing the frequency-dependence of both the amplitude and the phase under external magnetic field. The response on a continuous single frequency excitation shows complex behaviors including those of harmonic resonances and half-frequency resonances. Furthermore, the device time-domain response of any input voltage/current pulse under any external magnetic field (below 350 Oe) can be reconstructed from our measured frequency-domain maps through the Fourier transform, and is validated with our time-domain measurement data. \newline \newline *The authors would like to thank Dr. S. Wang and Dr DW Lee for growing CoFe thin-films. The work was supported in part by Western Institute of Nanoelectronics (WIN) and the Microelectronics Advanced Research Corporation (MARCO) Focus Center on Functional Engineered Nano Architectonics (FENA).

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Authors

  • Mingqiang Bao

    • EE Dept., UCLA

  • Alexander Khitun

    • EE Dept., UCLA

  • Jooyoung Lee

    • EE Dept., UCLA

  • Kang L. Wang

    • Device Research Laboratary, Department of Electrical Engineering, University of California, Los Angeles
    • Electrical Engineering Department, University of California, Los Angeles
    • EE Dept., UCLA
    • University of California, Los Angeles

  • Ajey P. Jacob

    • TMG External Programs, Intel Corporation