Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/348280
Type: Artigo
Title: Spin dynamics and two-dimensional correlations in the fcc antiferromagnetic Sr2YRuO6
Author: Disseler, S. M.
Lynn, J. W.
Jardim, R. F.
Torikachvili, M. S.
Granado, E.
Abstract: The face-centered-cubic (fcc) lattice of Ru5+ spins in the double perovskite Sr2YRuO6 shows a delicate, three-dimensional antiferromagnetic (AFM) ground state composed of stacked square AFM layers. Inelastic neutron scattering data taken on this state reveal a gapped low-energy excitation band emerging from [001] with spin excitations extending to 8meV. These magnetic excitations are modeled by a simple J(1)-J(2) interaction scheme allowing quantitative comparisons with similar materials. At higher temperatures, the low-energy excitation spectrum is dominated by a quasielastic component associated with size fluctuations of two-dimensional AFM clusters that exhibit asymmetric correlations even at low temperatures. Thus, the fcc lattice in general and the double-perovskite structure in particular emerge as hosts of both two-dimensional and three-dimensional dynamics resulting from frustration.
Subject: Antiferromagnetismo
Perovskitas duplas
Spin
Antiferromagnetism
Double perovskite
Spin
Country: Estados Unidos
Editor: American Physical Society
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.93.140407
Address: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.140407
Date Issue: 2016
Appears in Collections:IFGW - Artigos e Outros Documentos

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