Multiband effects in the electron spin resonance of Gd3+ in the intermediate-valence compound YbAl3 and its reference compound LuAl3
R. R. Urbano, E. M. Bittar, M. A. Pires, L. Mendonça Ferreira, L. Bufaiçal, C. Rettori, P. G. Pagliuso, B. Magill, S. B. Oseroff, J. D. Thompson and J. L. Sarrao
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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...
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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
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FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
00/08649-6; 03/09861-7; 04/08798-2
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
307668/03; 304466/20003-4
Aberto
Multiband effects in the electron spin resonance of Gd3+ in the intermediate-valence compound YbAl3 and its reference compound LuAl3
R. R. Urbano, E. M. Bittar, M. A. Pires, L. Mendonça Ferreira, L. Bufaiçal, C. Rettori, P. G. Pagliuso, B. Magill, S. B. Oseroff, J. D. Thompson and J. L. Sarrao
Multiband effects in the electron spin resonance of Gd3+ in the intermediate-valence compound YbAl3 and its reference compound LuAl3
R. R. Urbano, E. M. Bittar, M. A. Pires, L. Mendonça Ferreira, L. Bufaiçal, C. Rettori, P. G. Pagliuso, B. Magill, S. B. Oseroff, J. D. Thompson and J. L. Sarrao
Fontes
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Physical review. B, Condensed matter and materials physics (Fonte avulsa) |