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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Physical properties of EuPtIn4 intermetallic antiferromagnet

Texto completo
Autor(es):
Rosa, P. F. S. [1, 2] ; de Jesus, C. B. R. [1] ; Fisk, Z. [2] ; Pagliuso, P. G. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Calif Irvine, Irvine, CA 92697 - USA
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Journal of Magnetism and Magnetic Materials; v. 371, p. 5-9, DEC 2014.
Citações Web of Science: 2
Resumo

We report the physical properties of EuPtIn4 single crystalline platelets grown by the In flux technique. This compound crystallizes in the orthorhombic Cmcm structure with lattice parameters a = 4.542(1) <(A)over dot>, b = 16.955(2) <(A)over dot> and c = 7.389(1) <(A) over dot>. Measurements of magnetic susceptibility, heat capacity, electrical resistivity, and electron spin resonance (ESR) reveal that EuPtIn4 is a metallic Curie-Weiss paramagnet at high temperatures with an effective moment of mu(eff) approximate to 7.8(1) mu(B) due to divalent Eu ions. At low temperatures, antiferromagnetic (AFM) ordering is observed at T-N = 13.3 K followed by a successive anomaly at T{*} = 12.6 K. In addition, within the magnetic state, a spin-flop transition is observed with H-c similar to 2.5 T at T = 1.8 K when the magnetic held is applied along the ac-plane. In the paramagnetic state, a single divalent Eu2+ Dysonian ESR line with a Korringa relaxation rate of b = 4.1(2) Oe/K is observed. Interestingly, even at high temperatures, both ESR linewidth and electrical resistivity reveal a similar anisotropy. We discuss a possible common microscopic origin for the observed anisotropy in these physical quantities likely associated with an anisotropic magnetic interaction between Eu2+ 4f electrons mediated by conduction electrons. (C) 2014 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/20181-0 - Evolução do comportamento isolante Kondo topológico em Sm1xRxB6 (r = Sr, Yb)
Beneficiário:Priscila Ferrari Silveira Rosa
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado