| Texto completo | |
| Autor(es): |
Silva, L. S.
;
Mercena, S. G.
;
Garcia, D. J.
;
Bittar, E. M.
;
Jesus, C. B. R.
;
Pagliuso, P. G.
;
Lora-Serrano, R.
;
Meneses, C. T.
;
Duque, J. G. S.
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW B; v. 95, n. 13, p. 8-pg., 2017-04-19. |
| Resumo | |
In this paper, we report temperature-dependent magnetic susceptibility, electrical resistivity, and heat-capacity experiments in the family of intermetallic compounds RNi3Ga9 (R = Tb, Dy, Ho, and Er). Single-crystalline samples were grown using Ga self-flux method. These materials crystallize in a trigonal ErNi3Al9-type structure with space group R32. They all order antiferromagnetically with T-N < 20 K. The anisotropic magnetic susceptibility presents large values of the ratio chi(easy) / chi(hard) indicating strong crystalline electric-field (CEF) effects. The evolution of the crystal-field scheme for each R was analyzed in detail by using a spin model including anisotropic nearest-neighbor Ruderman-Kittel-Kasuya-Yosida interaction and the trigonal CEF Hamiltonian. Our analysis allows one to understand the distinct direction of the ordered moments along the series-the Tb-, Dy-, and Ho-based compounds have the ordered magnetic moments in the easy ab plane and the Er sample magnetization easy axis is along the <(c)over cap> direction. (AU) | |
| Processo FAPESP: | 12/04870-7 - Estudos de novos materiais complexos e avançados |
| Beneficiário: | Pascoal Jose Giglio Pagliuso |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |