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Broadband ferromagnetic resonance measurements of a micromagnetic disk array using a meander-line technique

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5 Author(s)
Nevirkovets, I.P. ; Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA ; Chernyashevskyy, O. ; Ketterson, J.B. ; Metlushko, V.
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A simple technique involving transmission through a copper-wire meander line is developed to study ferromagnetic resonance (FMR) in magnetic arrays. Using this technique, we carried out FMR measurements on a square array of submicrometer-size Permalloy magnetic disks for an external dc magnetic field parallel to the plane of the array, and found several magnetic excitation modes. The dominant mode obeys the Kittel formula for a plain film. The technique is suitable for studying the collective excitation modes in the magnetic nanoarrays over a broad range of frequencies.

Published in:

Journal of Applied Physics  (Volume:104 ,  Issue: 6 )

Date of Publication:

Sep 2008

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