High coercivity in large exchange-bias Co/CoO-MgO nano-granular films |
High-resolution transmission electron micrographs showing the size and morphology of (a) the Co22/(CoO)24-(MgO)15, (b) and (c) the Co56/(CoO)32-(MgO)12, and (d) the Co75/(CoO)15-(MgO)10 samples. |