Abstract
Quantum well states are found at the Fermi level in Cu on Co(100) and Ag on Fe(100) using inverse photoemission. They appear every 5.9±0.5 layers in Cu/Co(100), which agrees with the 5.5- to 6-layer oscillation period of the magnetic coupling in Cu/Co(100) superlattices. For Ag/Fe(100) they connect with minority-spin interface states observed below previously, providing a magnetic coupling channel through the noble metal. These properties are explained in terms of the bulk band structure.
- Received 6 February 1992
DOI:https://doi.org/10.1103/PhysRevLett.69.844
©1992 American Physical Society