Direct evidence for ferromagnetic spin polarization in gold nanoparticles
arXiv:cond-mat/0403600 · doi:10.1103/PhysRevLett.93.116801
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