Heavy fermion Ce3Co4Sn13 compound under pressure

Autor(es)

Collave, J. R. ^[1] ; Borges, H. A. ^[1] ; Ramos, S. M. ^{[2, 3]} ; Hering, E. N. ^{[2, 3]} ; Fontes, M. B. ^[2] ; Baggio-Saitovitch, E. ^[2] ; Mendonca-Ferreira, L. ^[4] ; Bittar, E. M. ^[2] ; Pagliuso, P. G. ^[5]

Afiliação do(s) autor(es)

^[1] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453900 Rio De Janeiro, RJ - Brazil

^[2] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ - Brazil

^[3] UJF Grenoble 1, SPSMS, UMR E CEA, F-38054 Grenoble - France

^[4] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil

^[5] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Physics; v. 117, n. 17 MAY 7 2015.
• Citações Web of Science: 6

Resumo

The non-magnetic heavy fermion compound Ce3Co4Sn13 was studied under pressure. We report single crystalline measurements of electrical resistivity as a function of temperature rho(T) under pressure. Some characteristic features related to a structural transition (T-S), crystalline field effects (T-CEF), and a low temperature maximum (T-max), possibly connected simultaneously to the onset of Kondo lattice coherence and short range magnetic correlations, were identified in the rho(T) data. A pressure-temperature phase diagram with T-S and T-max was constructed by mapping these features. Like for most Ce-based heavy fermion compounds, T-max moves to higher temperatures with pressure, indicating that it is related to the Kondo energy scale, due to the increase of hybridization induced by pressure. On the other hand, T-S, associated to a superlattice distortion and probably combined with a charge density wave transition, decreases as a function of pressure. However, differently from the Sr3-xCaxIr4Sn13 system, where a superlattice quantum phase transition is observed {[}L. E. Klintberg et al., Phys. Rev. Lett. 109, 237 008 (2012)], in Ce3Co4Sn13 T-S similar to 154 K, at ambient pressure (P = 0), seems to stabilize at around 143K for P >= 19 kilobars. We also investigated rho(T) in external magnetic fields, at P = 0. Negative magnetoresistance and increase of T-max are observed, suggesting suppression of low temperature short range magnetic correlations. (C) 2015 AIP Publishing LLC. (AU)

• Processo FAPESP: 11/19924-2 - Estudo e desenvolvimento de novos materiais avançados: eletrônicos, magnéticos e nanoestruturados: uma abordagem interdisciplinar
• Beneficiário: Carlos Rettori
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/04870-7 - Estudos de novos materiais complexos e avançados
• Beneficiário: Pascoal Jose Giglio Pagliuso
• Modalidade de apoio: Auxílio à Pesquisa - Temático