Sensitive detection of vortex-core resonance using amplitude-modulated magnetic field

Xiaomin Cui, Shaojie Hu, Makoto Hidegara, Satoshi Yakata, Takashi Kimura

研究成果: ジャーナルへの寄稿学術誌査読

5 被引用数 (Scopus)

抄録

Understanding and manipulating the dynamic properties of the magnetic vortices stabilized in patterned ferromagnetic structures are of great interest owing to the superior resonant features with the high thermal stability and their flexible tunability. So far, numerous methods for investigating the dynamic properties of the magnetic vortex have been proposed and demonstrated. However, those techniques have some regulations such as spatial resolution, experimental facility and sensitivity. Here, we develop a simple and sensitive method for investigating the vortex-core dynamics by using the electrically separated excitation and detection circuits. We demonstrate that the resonant oscillation of the magnetic vortex induced by the amplitude-modulated alternating-sign magnetic field is efficiently picked up by the lock-in detection with the modulated frequency. By extending this method, we also investigate the size dependence and the influence of the magneto-static interaction in the resonant property of the magnetic vortex.

本文言語英語
論文番号17922
ジャーナルScientific reports
5
DOI
出版ステータス出版済み - 12月 9 2015

!!!All Science Journal Classification (ASJC) codes

  • 一般

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