Direct evidence for ferromagnetic spin polarization in gold nanoparticles

Details Direct evidence for ferromagnetic spin polarization in gold nanoparticles Direct evidence for ferromagnetic spin polarization in gold nanoparticles

2004-03-24

arxiv.org/abs/cond-mat/0403600v1

Physics

Condensed Matter

Materials Science

4 pages, 3 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.93.116801

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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