High coercivity in large exchange-bias Co/CoO-MgO nano-granular films*
Ge Chuan-Nana),b), Wan Xian-Ganga)†, Eric Pellegrinc), Hu Zhi-Weid), Wen-I Liange), Michael Brunsf), Zou Wen-Qina), Du You-Weia)
(a) Exchange bias HE and (b) coercive field H C as functions of the cooling field H FC for Co56/(CoO)32-(MgO)12 measured after cooling the sample down to 2 K.