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

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

doi:10.1038/srep17922

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

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

Condensed Matter Physics

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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.

Original language	English
Article number	17922
Journal	Scientific reports
Volume	5
DOIs	https://doi.org/10.1038/srep17922
Publication status	Published - Dec 9 2015

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10.1038/srep17922

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title = "Sensitive detection of vortex-core resonance using amplitude-modulated magnetic field",

abstract = "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.",

author = "Xiaomin Cui and Shaojie Hu and Makoto Hidegara and Satoshi Yakata and Takashi Kimura",

note = "Funding Information: This work is partially supported by Grant-in-Aid for Scientific Research on Innovative Area, “Nano Spin Conversion Science” (26103002) and that for Scientific Research (S) (25220605). The authors (Xiaomin Cui and Shaojie Hu) acknowledge the China Scholarship Council for Young Scientists and Marubun Foundation.",

year = "2015",

month = dec,

day = "9",

doi = "10.1038/srep17922",

language = "English",

volume = "5",

journal = "Scientific reports",

issn = "2045-2322",

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T1 - Sensitive detection of vortex-core resonance using amplitude-modulated magnetic field

AU - Cui, Xiaomin

AU - Hu, Shaojie

AU - Hidegara, Makoto

AU - Yakata, Satoshi

AU - Kimura, Takashi

N1 - Funding Information: This work is partially supported by Grant-in-Aid for Scientific Research on Innovative Area, “Nano Spin Conversion Science” (26103002) and that for Scientific Research (S) (25220605). The authors (Xiaomin Cui and Shaojie Hu) acknowledge the China Scholarship Council for Young Scientists and Marubun Foundation.

PY - 2015/12/9

Y1 - 2015/12/9

N2 - 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.

AB - 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.

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ER -

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

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