Maiti K, Malagoli MC, Dallmeyer A, Carbone C. Finite temperature magnetism in Gd: evidence against a Stoner behavior.
PHYSICAL REVIEW LETTERS 2002;
88:167205. [PMID:
11955260 DOI:
10.1103/physrevlett.88.167205]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2001] [Indexed: 05/23/2023]
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 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< or =T/T(C)< or=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.
Collapse