Abstract
By spin- and angle-resolved photoemission with synchrotron radiation the electronic structure of Fe(100) has been tested between room temperature and the Curie temperature for photon energies in the range 20–70 eV. The spin-resolved energy-distribution curves (SREDC’s) reflect the dispersions of the ,↓-symmetry initial-state bands. This manifests in an abrupt change in spin character of the peak near from predominantly minority spin to majority spin when tuning the photon energy across 33 eV. The non-spin-resolved EDC’s thereby remain nearly unchanged. Upon heating to 0.85T/, depending on photon energy, qualitative different changes in the SREDC’s are observed: At hν=60 eV, is found to be stationary in energy upon heating, and the spin-summed intensity decreases by less than 5%. At , a strong loss of intensity occurs. In contrast, at hν=31 and 21 eV, an increase in minority-spin (and total) photocurrent upon heating is observed. This is interpreted as resulting from a decrease of the exchange splitting with temperature near H.
- Received 4 June 1984
DOI:https://doi.org/10.1103/PhysRevB.31.329
©1985 American Physical Society