La-dilution effects in antiferromagnetic TbRhIn5 single crystals

Autor(es)

Lora-Serrano, R. ; Garcia, D. J. ; Miranda, E. ; Adriano, C. ; Giles, C. ; Duque, J. G. S. ; Pagliuso, P. G.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW B; v. 79, n. 2, p. 8-pg., 2009-01-01.

Resumo

We report on measurements of temperature-dependent magnetic susceptibility, resonant x-ray magnetic scattering (XRMS), and heat capacity on single crystals of Tb1-xLaxRhIn5 for nominal concentrations in the range 0 <= x < 1. TbRhIn5 is an antiferromagnetic (AFM) compound with T-N approximate to 46 K, which are the highest T-N values along the RRhIn5 series (R: rare earth). We explore the suppression of the AFM state as a function of La doping considering the effects of La-induced dilution and perturbations to the tetragonal crystalline electrical field on the long-range magnetic interaction between the Tb3+ ions. Additionally, we also discuss the role of disorder. Our results and analysis are compared to the properties of the nondoped compound and of other members of the RRhIn5 family and structurally related compounds (R2RhIn8 and RIn3). The XRMS measurements reveal that the commensurate magnetic structure with the magnetic wave vector (01/21/2) observed for the nondoped compound is robust against doping perturbations in Tb0.6La0.4RhIn5 compound. (AU)

• Processo FAPESP: 06/60387-2 - Estudos das propriedades e estruturas magnéticas de novos compostos intermetálicos
• Beneficiário: Raimundo Lora Serrano
• Modalidade de apoio: Auxílio à Pesquisa - Programa Primeiros Projetos
• Processo FAPESP: 06/50511-8 - Estudo de prpriedades e estruturas magneticas de novos compostos intermetalicos derivados da familia rmmnln3m+2n (r=terra-terra-rara; m=rh,ir ou co, m=1,2 e n=0,1).
• Beneficiário: Raimundo Lora Serrano
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 06/60440-0 - Estudo de sistemas fortemente correlacionados em condições extremas
• Beneficiário: Carlos Rettori
• Modalidade de apoio: Auxílio à Pesquisa - Temático