Temperature Dependence of the Exchange Splitting of the Surface State on Gd(0001): Evidence against Spin-Mixing Behavior

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.3415· OSTI ID:388396

Weschke, E; Schuessler-Langeheine, C; Meier, R; Fedorov, A V; Starke, K; Huebinger, F; Kaindl, G ^[1]

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1. Institut fuer Experimentaliphysik, Freie Universitaet Berlin, Arnimallee 14, D-14195 Berlin-Dahlem (Germany)

We report on angle-resolved photoemission (PE) and inverse PE studies of Gd(0001) in the temperature range 60 to 400K. The results show that with increasing temperature both the occupied and the unoccupied parts of the {ital d}-like surface state at {Gamma} shift towards the Fermi level. This rules out a pure spin-mixing behavior as claimed recently on the basis of spin-resolved PE data. Instead, the temperature variation of the surface-state exchange splitting is Stoner-like, with an enhanced surface Curie temperature; nevertheless, a small residual splitting above {ital T}{sub {ital C}} cannot be ruled out. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 388396
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BINDING ENERGY
CURIE POINT
ELECTRONIC STRUCTURE
EXCHANGE INTERACTIONS
GADOLINIUM
MAGNETIC MOMENTS
PHOTOEMISSION
SURFACES
TEMPERATURE DEPENDENCE