Surface stability of maghemite by Cu shell

Increased surface spin stability in  gamma-Fe2O3 nanoparticles with a Cu shell.R D Desautels, E Skoropata, Y-Y Chen, H Ouyang, J W Freeland and J van Lierop
J. Phys.: Condens. Matter 24, 146001 (2012)

(a) Temperature dependence of the Fe magnetization determined from the TEY XMCD signaland the Cu2C interface coating magnetization from the TFY XMCD signal. Cu(0.5 nm)/Fe2O3 and Cu(1.0 nm)/Fe2O3 NPs (b) Temperature dependence of the Fe A- and B-site magnetization.