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Publication Citation: Effect of interactions on edge property measurements in magnetic multilayers

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Author(s): Meng Zhu; Robert D. McMichael;
Title: Effect of interactions on edge property measurements in magnetic multilayers
Published: February 25, 2011
Abstract: This paper reports effects of inter-film interactions on static and dynamic magnetization behavior at film edges in magnetic trilayer stripe arrays under transverse applied fields. The trilayers consist of two magnetic films of Ni80Fe20, 10 nm and 20 nm thick that interact via dipolar fields across thin, nonmagnetic spacers from 1 nm to 20 nm thick. These trilayer films are patterned into stripe arrays by optical interference lithography. Ferromagnetic resonance spectra exhibit separate edge modes that are identified as excitation of edge modes primarily in one magnetic film or the other. When interlayer exchange is negligible, we observe several effects of dipolar edge-edge coupling including shifts of the edge saturation fields and changes in the mode intensity ratio relative to single-film edges. These interaction effects are reproduced by micromagnetic modeling and explained by simple models.
Citation: Journal of Applied Physics
Volume: 109
Issue: 4
Pages: 8 pp.
Keywords: ferromagnetic resonance, edge mode, diploar interactions, magnetic multilayers, micromagnetic simulation
Research Areas: Physics, Nanomagnetics, Electron Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (935KB)