Antiferromagnetic exchange weakening in the TbRhIn5 intermetallic system with Y-substitution

Autor(es):Mostrar menos -

Amaral, R. P. ^[1] ; Lora-Serrano, R. ^{[1, 2]} ; Garcia, D. J. ^{[3, 4]} ; Iwamoto, W. A. ^[1] ; Betancourth, D. ^{[3, 4]} ; Cadogan, J. M. ^[2] ; Munoz-Perez, S. ^[2] ; Avdeev, M. ^[5] ; Cobas-Acosta, R. ^[2] ; Bittar, E. M. ^[6] ; Duque, J. G. S. ^[7] ; Pagliuso, P. G. ^[8]

Afiliação do(s) autor(es)

^[1] Univ Fed Uberlandia, Inst Fis, BR-38408100 Uberlandia, MG - Brazil

^[2] UNSW Canberra Australian Def Force Acad, Sch Phys Environm & Math Sci, Canberra, ACT 2610 - Australia

^[3] Ctr Atom Bariloche, San Carlos De Bariloche, Rio Negro - Argentina

^[4] Consejo Nacl Invest Cient & Tecn, San Carlos De Bariloche, Rio Negro - Argentina

^[5] ANSTO, Bragg Inst, PMB 1, Menai, NSW 2234 - Australia

^[6] Ctr Brasileiro Pesquisas Fis, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, RJ - Brazil

^[7] Univ Fed Sergipe, Programa Posgrad Fis, Campus Prof Jose Aluisio de Campos, BR-49100000 Sao Cristovao, SE - Brazil

^[8] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERMETALLICS; v. 98, p. 161-168, JUL 2018.
• Citações Web of Science: 1

Resumo

We report measurements of the temperature dependent specific heat and magnetic susceptibility in single crystals of the series of intermetallic compounds Tb1-xYxRhIn5 (nominal concentrations x = 0.0, 0.15, 0.3, 0.4, 0.5, 0.7). A mean field approximation to simulate the macroscopic properties along the series has been used. Neutron diffraction data in powdered samples of Tb(0.5)Y(0.4)Rhln(5) and Tb0.6La0.4RhIn5 reveal antiferromagnetic (AFM) propagation vector (k) over right arrow ={[}1/2 0 1/2] with the magnetic moments oriented along the tetragonal c axis or canted from this axis, respectively for Y and La-substitutions. Considering both the simulations of the magnetic exchange and neutron diffraction data, we discuss the role of combined effects of crystalline electric field (CEF) perturbations and dilution in the evolution of magnetic properties with Y and La contents. In particular, we found negligible variations of the B-n(m) parameters along the Y series. The decrease of TN with x is fully dominated by magnetic dilution effects. (AU)

• 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: 12/04870-7 - Estudos de novos materiais complexos e avançados
• Beneficiário: Pascoal Jose Giglio Pagliuso
• Modalidade de apoio: Auxílio à Pesquisa - Temático