Direct evidence for ferromagnetic spin polarization in gold   nanoparticles
  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. 
Y. Yamamoto, T. Miura, T. Teranishi, M. Miyake, H. Hori, M. Suzuki, N.   Kawamura, H. Miyagawa, T. Nakamura and K. Kobayashi