Author(s):
Urbano, Ricardo Rodrigues, 1974- ; Bittar, Eduardo Matzenbacher, 1979- ; Pires, Maria Amélia, 1952- ; Ferreira, Letície Mendonça ; Bufaiçal, Leandro Félix de Sousa, 1981- ; Rettori, Carlos, 1941- ; Pagliuso, Pascoal José Giglio, 1971-
Date: 2007
Persistent ID: https://hdl.handle.net/20.500.12733/1666278
Origin: Oasisbr
Subject(s): Ressonância de spin eletrônico; Compostos intermetálicos; Férmions pesados; Electron spin resonance; Intermetallic compounds; Heavy fermions; Artigo original; Ressonância de spin eletrônico; Ressonância de spin eletrônico; Compostos intermetálicos; Compostos intermetálicos; Férmions pesados; Férmions pesados; Electron spin resonance; Electron spin resonance; Intermetallic compounds; Intermetallic compounds; Heavy fermions; Heavy fermions; Artigo original; Artigo original
Description
Agradecimentos: This work was supported by FAPESP (SP-Brazil) Grants Nos. 04/08798-2, 03/09861-7, and 00/08649-6 and CNPq (Brazil) Grants Nos. 307668/03, 04/08798-2, and 304466/20003-4. Work at LANL was performed under the auspices of the U.S. DOE
Abstract: Electron spin resonance (ESR) results of Gd3+ in YbAl3 and LuAl3 are analyzed using a multiband (f-, d-, and p-type) model of correlated conduction electrons. The need for a multiband analysis of our results is based on the following observations: (i) the Korringa rates b similar or equal to 14 Oe/K and b similar or equal to 9 Oe/K for Gd3+ for YbAl3 and LuAl3, respectively, are larger than those expected from the respective measured g shifts (Knight shift), and (ii) negative and positive g shifts Delta g similar or equal to-0.004 and Delta g similar or equal to+0.003 were observed for Gd3+ in YbAl3 and LuAl3, respectively. Specific heat and magnetic susceptibility measurements, in the samples studied by ESR, show that electron-electron correlations are present in both compounds
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
Aberto
