The temperature dependence of the rare-earth valence bands has been regarded as a realization of the Stoner behavior. The exchange splitting of the electronic states appears to scale as the magnetic order parameter for T<TC and to vanish at T = TC. We report here a spin-resolved photoemission study on the evolution of Gd bulk bands for 0.5T/TC < 1. The spin-polarized spectral line shapes display a complex temperature dependence, which clearly contrasts with the interpretation of previous experimental results. The spin-resolved photoemission data demonstrate the inadequacy of the Stoner model to the description of magnetism in rare earths.
Finite Temperature Magnetism in Gd: Evidence against a Stoner Behavior
2002
Abstract
The temperature dependence of the rare-earth valence bands has been regarded as a realization of the Stoner behavior. The exchange splitting of the electronic states appears to scale as the magnetic order parameter for TI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
