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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Cui X,Hu S,Hidegara M,Yakata S,Kimura Tdoi
10.1038/srep17922subject
Has Abstractpub_date
2015-12-09 00:00:00pages
17922issn
2045-2322pii
srep17922journal_volume
5pub_type
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