Abstract
Oscillatory exchange coupling is observed in superlattices over length scales comparable to metallic superlattices. However, the strength of the coupling is almost an order of magnitude stronger than that commonly observed in metallic superlattices. In addition, a unique positive magnetoresistance effect is also seen. These observations are discussed in terms of the carrier confinement effects caused by the half metallicity of the magnetic layers.
- Received 14 April 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.1680
©1999 American Physical Society