Current-driven antivortex core resonance measured by the rectifying effect | Zendy

Minori Goto | Zendy; Yukio Nozaki | Zendy

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Current-driven antivortex core resonance measured by the rectifying effect

Author(s) -

Minori Goto,

Yukio Nozaki

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4941360

Subject(s) - resonance (particle physics) , current (fluid) , core (optical fiber) , condensed matter physics , excited state , magnetization , amplitude , voltage , nuclear magnetic resonance , magnetization dynamics , ferromagnetic resonance , field (mathematics) , magnetic field , physics , atomic physics , optics , mathematics , quantum mechanics , pure mathematics , thermodynamics

We demonstrate the current-driven resonance of a single antivortex core confined in a cross-shaped Ni81Fe19 wire. The antivortex core dynamics can be excited purely by spin transfer torque; therefore, it is significant to understand the current-induced magnetization dynamics. The antivortex core resonance can be measured from the frequency dependence of a rectified voltage generated by an alternating current application. We found that the resonance frequency and peak amplitude greatly depend on the external magnetic field. This result is in good agreement with micromagnetic simulation

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