Tuning the surface magnetism of gamma-Fe2O3 nanoparticles with a Cu shell - art. no. 262501

[摘要]：An interfacial monolayer of CuO in Cu-coated gamma-Fe2O3 nanoparticles enables significantly decreased intrinsic surface spin disorder compared to bare gamma-Fe2O3 nanoparticles. Element specific x-ray absorption spectroscopy at the L-edges for Cu and Fe indicates that the magnetic moment of the CuO in the shell interacts with the gamma-Fe2O3 nanoparticle's surface magnetic moments. This exchange interaction cants the moments of the CuO resulting in a non-zero Cu moment, altering the gamma-Fe2O3 nanomagnetism. (C) 2011 American Institute of Physics. [doi:10.1063/1.3671989]

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