| Texto completo | |
| Autor(es): Mostrar menos - |
Alho, B. P.
[1]
;
Lopes, P. H. O.
[1]
;
Ribeiro, P. O.
[2]
;
Alvarenga, T. S. T.
[1]
;
Nobrega, E. P.
[1]
;
de Sousa, V. S. R.
[1]
;
Carvalho, A. M. G.
[3]
;
Caldas, A.
[1]
;
Tedesco, J. C. G.
[4]
;
Coelho, A. A.
[5]
;
de Oliveira, N. A.
[1]
;
von Ranke, P. J.
[1]
Número total de Autores: 12
|
| Afiliação do(s) autor(es): | [1] Univ Estado Rio de Janeiro UERJ, Inst Fis Armando Dias Tavares, Rua Sao Francisco Xavier 524, BR-20550013 Rio De Janeiro, RJ - Brazil
[2] Univ Estado Rio de Janeiro UERJ, Inst Aplicacao Fernando Rodrigues da Silveira, Rua Santa Alexandrina 288, BR-20261232 Rio De Janeiro, RJ - Brazil
[3] CNPEM, LNLS, BR-13083970 Campinas, SP - Brazil
[4] Univ Estado Rio de Janeiro, Inst Politecn, Rua Bonfim 25, BR-28625570 Nova Friburgo, RJ - Brazil
[5] Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Magnetism and Magnetic Materials; v. 449, p. 308-312, MAR 1 2018. |
| Citações Web of Science: | 2 |
| Resumo | |
In this work, we report the magnetic and magnetocaloric properties of the Gd1-yPryNi2 compounds from both experimental and theoretical points of view. It is worth noting that this series shows a variety of magnetic arrangements depending on the Pr concentration, including paramagnetism, ferrimagnetism and ferromagnetism. Our experimental work consists of the systematic analysis of the magnetic properties of the compounds with y = 0.0, 0.25, 0.5, 0.75 and 1.0, which includes temperature and magnetic field dependence of the magnetization, heat capacity and isothermal entropy change obtained by isothermal magnetization curves. Also, we developed a model Hamiltonian, which takes into account the exchange interactions among Gd-Gd, Gd-Pr and Pr-Pr ions, the Zeeman interaction for both ions and the crystalline electrical field interaction for the Pr ions. We systematically investigated the magnetic properties of the series and obtained a good agreement when compared with our experimental data. (C) 2017 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 12/03480-0 - Efeito magnetocalórico e efeito barocalórico: novas técnicas experimentais, materiais e modelos teóricos |
| Beneficiário: | Alexandre Magnus Gomes Carvalho |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |