Dispersion and spin wave "tunneling" in nano-structured magnetostatic spin waveguides

A. Kozhanov (1) , D. Ouellette (1) , M. Rodwell (1) , A. P. Jacob (2) , D. W. Lee (3) , S. X. Wang (3) , S. J. Allen (1) ((1) University of California at Santa Barbara (2)Technology , Manufacturing Group

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Intel Corporation Santa Clara CA & Western Institute of Nanoelectronics (WIN) UCLA Los Angeles CA (3)Department of Materials Science Engineering Sanford University Stanford CA)

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classification ❄️ cond-mat.mtrl-sci

keywords spindispersionwavemagnetostaticmeasuredagreementattenuationbeam

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Magnetostatic spin wave dispersion and loss are measured in micron scale spin wave-guides in ferromagnetic, metallic CoTaZr. Results are in good agreement with model calculations of spin wave dispersion. The measured attenuation lengths, of the order of 3um, are several of orders of magnitude shorter than that predicted from eddy currents in these thin wires. Spin waves effectively "tunnel" through air gaps, produced by focused ion beam etching, as large as 1.5 um.

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Dispersion and spin wave "tunneling" in nano-structured magnetostatic spin waveguides

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