Spin Disorder Resistivity and Electronic Specific Heat of Gd-4(Co1-xCux)(3) Compounds

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2008

Autores

Teresa Seixas (Autor) FCUP; M. A. Salgueiro da Silva (Autor) FCUP; de Lima, OF (Autor) Outra; Lopez, J (Autor) Outra; Braun, HF (Autor) Outra; Eska, G (Autor) Outra

Ata de Conferência Internacional

Título: ADVANCED MATERIALS FORUM IV

Páginas: 333-337

13th Conference of the Sociedade-Portuguesa-de-Materiais/4th International Materials Symposium

Oporto, PORTUGAL, APR 01-04, 2007

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-004-27W

Abstract (EN): In this work, we present a study of the spin disorder resistivity (rho(m infinity)) and the electronic specific heat coefficient (gamma) in Gd-4(Co1-xCux)(3) compounds, with x = 0, 0.05, 0.10, 0.20, 0.30. The experimental results show a strongly non-linear dependence of rho(m infinity) on the de Gennes factor which, in similar intermetallic compounds. is usually attributed to the existence of spin fluctuations on the Co 3d bands and its amplification by the thermal disorder of the Gd magnetic moments through the Gd-Co exchange coupling. Using a novel combined analysis of rho(m infinity) and gamma, we show, however, that only, electron band structure changes are involved in the anomalous behaviour of rho(m infinity) and that a linear dependence of rho(m infinity) on the de Gennes factor is obtained when the variation of the effective mass is properly taken into account.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5