TY - JOUR
T1 - Directional dependence of vortex core resonance in a square-shaped ferromagnetic dot
AU - Cui, Xiaomin
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 ). One of the authors (X.C.) acknowledge the China Scholarship Council for Young Scientists.
PY - 2016/1/12
Y1 - 2016/1/12
N2 - The resonant property of the magnetic vortex confined in a square-shaped ferromagnetic dot has been investigated. We showed that the field dependence of the resonant frequency has a unique directional dependence originating from a four-fold rotational symmetry of the square. The resonant frequency is found to be strongly modulated by the magnetic field along the diagonal direction although the magnetic field applied along the side of the square hardly modified the resonant frequency. The modulation ratio of the resonant frequency defined by the ratio between minimum and maximum frequencies for the vortex resonance was found to be tuned by the lateral dimension of the square. These unique frequency tunabilities controlled by the magnitude and the direction of the magnetic field may provide additional functions in the application of the magnetic vortex systems.
AB - The resonant property of the magnetic vortex confined in a square-shaped ferromagnetic dot has been investigated. We showed that the field dependence of the resonant frequency has a unique directional dependence originating from a four-fold rotational symmetry of the square. The resonant frequency is found to be strongly modulated by the magnetic field along the diagonal direction although the magnetic field applied along the side of the square hardly modified the resonant frequency. The modulation ratio of the resonant frequency defined by the ratio between minimum and maximum frequencies for the vortex resonance was found to be tuned by the lateral dimension of the square. These unique frequency tunabilities controlled by the magnitude and the direction of the magnetic field may provide additional functions in the application of the magnetic vortex systems.
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U2 - 10.1016/j.physe.2015.08.038
DO - 10.1016/j.physe.2015.08.038
M3 - Article
AN - SCOPUS:84941308543
SN - 1386-9477
VL - 75
SP - 28
EP - 32
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
ER -