Probing the localized to itinerant behavior of the 4f electron in CeIn3-xSnx by Gd3+ electron spin resonance

Autor(es)

Bittar, E. M. ^{[1, 2]} ; Adriano, C. ^[1] ; Giles, C. ^[1] ; Rettori, C. ^{[1, 3]} ; Fisk, Z. ^[4] ; Pagliuso, P. G. ^{[1, 4]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

^[2] Lab Nacl Luz Sincrotron, BR-13083970 Campinas, SP - Brazil

^[3] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil

^[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 - USA

• Tipo de documento: Artigo Científico
• Fonte: Physical Review B; v. 86, n. 12 SEP 6 2012.
• Citações Web of Science: 5

Resumo

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 -> 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. (AU)

• Processo FAPESP: 11/01564-0 - Síntese e caracterização de novos materiais complexos e avançados
• Beneficiário: Pascoal Jose Giglio Pagliuso
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 06/55347-1 - Propriedades magneticas locais e globais dos compostos intermetalicos cubicos de terras raras (r):rt3 (t=in, sn, al) e r3co3sn13 (m=co,pt)
• Beneficiário: Eduardo Matzenbacher Bittar
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 06/60440-0 - Estudo de sistemas fortemente correlacionados em condições extremas
• Beneficiário: Carlos Rettori
• Modalidade de apoio: Auxílio à Pesquisa - Temático