Probing the localized to itinerant behavior of the 4f electron in CeIn3-xSnx by Gd3+ electron spin resonance
| Autor: | Bittar, Eduardo Matzenbacher, 1979, Adriano, Cris, 1980, Antunez de Mayolo, Carlos Manuel Giles, 1964-2016, Rettori, Carlos, 1941, Pagliuso, Pascoal José Giglio, 1971 |
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| Přispěvatelé: | UNIVERSIDADE ESTADUAL DE CAMPINAS |
| Rok vydání: | 2012 |
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| Zdroj: | Repositório da Produção Científica e Intelectual da Unicamp Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP |
| Popis: | Agradecimentos: We thank J. C. B. Monteiro and F. C. G. Gandra for their help with the polycrystalline samples. This work was supported by FAPESP (Grant Nos. 06/55347-1, 06/60440-0, 07/50986-0 and 11/01564-0); CNPq, FINEP, and CAPES (Brazil); and NSF (Grant No. NSF-DMR-0801253) (USA) Abstract: The CeIn3-xSnx cubic heavy fermion system presents an antiferromagnetic transition at T-N = 10 K, for x = 0, that decreases continuously down to 0 K upon Sn substitution at a critical concentration of x(c) approximate to 0.65. In the vicinity of T-N -gt; 0 the system shows non-Fermi liquid behavior due to antiferromagnetic critical fluctuations. For a high Sn content, x greater than or similar to 2.2, intermediate valence effects are present. In this work we show that Gd3+-doped electron spin resonance (ESR) probes a change in the character of the Ce 4f electron, as a function of Sn substitution. The Gd3+ ESR results indicate a transition of the Ce 4f spin behavior from localized to itinerant. Near the quantum critical point, on the antiferromagnetic side of the magnetic phase diagram, both localized and itinerant behaviors coexist FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ FINANCIADORA DE ESTUDOS E PROJETOS - FINEP COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES Fechado |
| Databáze: | OpenAIRE |
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