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Influence of Periodic Patterning on the Magnetization Response of Micromagnetic Structures

Published

Author(s)

SangHyun S. Lim, Thomas M. Wallis, Atif A. Imtiaz, Dazhen Gu, Thomas Cecil, Pavel Kabos, Pavol Krivoski

Abstract

The magnetization dynamics of a single, patterned, thin-film Permalloy (Ni80Fe20, Py) elements embedded in a coplanar waveguide (CPW) are investigated. The anisotropic magnetoresistance (AMR) effect serves as the detection mechanism in current-modulated differential resistance (dV/dI) measurements, which reveal formation and dislocation of vortices. Driving the system with a radio frequency (RF) signal tuned to the resonance frequency of the vortex motion results in fluctuations in the vortex average positions, as observed in time dependent measurements. At particular values of the fixed bias field and RF signal frequency, the average positions of the vortex cores move between distinct states.
Citation
Applied Physics Letters
Volume
2

Citation

Lim, S. , Wallis, T. , Imtiaz, A. , Gu, D. , Cecil, T. , Kabos, P. and Krivoski, P. (2011), Influence of Periodic Patterning on the Magnetization Response of Micromagnetic Structures, Applied Physics Letters, [online], https://doi.org/10.1109/LMAG.2011.2119394 (Accessed April 15, 2024)
Created March 29, 2011, Updated November 10, 2018