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Finite Temperature Magnetism in Gd: Evidence against a Stoner Behavior
2002
Physical Review Letters
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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 , T C and to vanish at T T C . We report here a spin-resolved photoemission study on the evolution of Gd bulk bands for 0.5 # T ͞T C # 1. The spin-polarized spectral line shapes display a complex temperature dependence, which clearly contrasts with the interpretation of
doi:10.1103/physrevlett.88.167205
pmid:11955260
fatcat:643qjfqmabe6lan3ef6jim4rlu