Direct evidence for ferromagnetic spin polarization in gold nanoparticles

Abstract

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.

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

References in corpus (1)

• Diameter dependence of ferromagnetic spin moment in Au nanocrystals

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