Abstract
The exchange bias of coupled polycrystalline films of antiferromagnetic CoO and ferromagnetic Co was significantly enhanced by the systematic substitution of nonmagnetic Mg for Co in CoO. Samples in which either Co or were deposited first were investigated at temperatures from 10 to 300 K. With on the bottom, the increased interfacial uncompensated spin density of the single antiferromagnetic domain crystallites produced the enhanced . With Co on the bottom, a thin interfacial oxide layer was primarily responsible for the strongly increased .
- Received 3 September 2005
DOI:https://doi.org/10.1103/PhysRevLett.96.117204
©2006 American Physical Society