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In-plane anisotropy of coercive field in permalloy square ring arrays

By A.V. Goncharov, A.A. Zhukov, V.V. Metlushko, G. Bordignon, H. Fangohr, G. Karapetrov, B. Ilic and P.A.J. de Groot

Abstract

Magnetic ring arrays are promising candidates for application in magnetic random access memory devices. The magnetic reversal processes and anisotropy of the coercivity in arrays of square-shaped nanorings with different spacings were investigated by vector magneto-optical Kerr effect magnetometry, magnetic force microscopy, and micromagnetic simulations. Two-step magnetization reversal demonstrates fourfold symmetry in the film plane resulting from the shape anisotropy in rings. Our numerical simulations show good agreement with the experiment

Topics: QB, QD, QC
Year: 2006
OAI identifier: oai:eprints.soton.ac.uk:57281
Provided by: e-Prints Soton

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