Abstract
The electron-spin polarization P at the topmost layer of atomically clean, magnetized gadolinium (Gd) surfaces is measured by using electron capture spectroscopy. P varies almost linearly with temperature between 160 K (P=-42%) and 315 K (P=0). It is found that the surface Curie temperature is far above—lying near 310 K—the bulk Curie temperature =292.5 K, indicating uniaxial anisotropic magnetic exchange interactions at the topmost surface layer of Gd.
- Received 9 June 1986
DOI:https://doi.org/10.1103/PhysRevB.34.6347
©1986 American Physical Society