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Spectroscopic Ellipsometry of Yttrium–Iron Garnet Thin Films Containing Gold Nanoparticles

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Published 26 October 2007 Copyright (c) 2007 The Japan Society of Applied Physics
, , Citation Satoshi Tomita et al 2007 Jpn. J. Appl. Phys. 46 L1032 DOI 10.1143/JJAP.46.L1032

1347-4065/46/11L/L1032

Abstract

We report complex dielectric function (ε) for yttrium–iron garnet thin films containing Au nanoparticles. Films are prepared using a co-sputtering method with post-annealing. Real and imaginary parts of ε of the films are obtained using spectroscopic ellipsometry in a photon energy region from near-infrared to ultra-violet. An anomalous dispersion of Re[ε] in the visible region originating from localized surface plasmon of Au nanoparticles is clearly observed. The influence of ε on the magneto-optical Kerr properties of the nanocomposite films is discussed.

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10.1143/JJAP.46.L1032