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Direct evidence for ferromagnetic spin polarization in gold nanoparticles

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arxiv cond-mat/0403600 v1 pith:O3TIDIP7 submitted 2004-03-24 cond-mat.mtrl-sci

Y. Yamamoto , T. Miura , T. Teranishi , M. Miyake , H. Hori , M. Suzuki , N. Kawamura , H. Miyagawa
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T. Nakamura K. Kobayashi
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classification cond-mat.mtrl-sci
keywords goldpolarizationspinxmcddirectevidenceferromagneticmagnetization
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We report the first direct observation of ferromagnetic spin polarization of Au nanoparticles with a mean diameter of 1.9 nm using X-ray magnetic circular dichroism (XMCD). Owing to the element selectivity of XMCD, only the gold magnetization is explored. Magnetization of gold atoms estimated by XMCD shows a good agreement with the results obtained by conventional magnetometry. This result is evidence of intrinsic spin polarization in nano-sized gold.

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