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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Spin dynamics and two-dimensional correlations in the fcc antiferromagnetic Sr2YRuO6

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Disseler, S. M. [1] ; Lynn, J. W. [1] ; Jardim, R. F. [2] ; Torikachvili, M. S. [3] ; Granado, E. [4]
Total Authors: 5
[1] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 - USA
[2] Univ Sao Paulo, Inst Fis, CP 66318, BR-05315970 Sao Paulo - Brazil
[3] San Diego State Univ, Dept Phys, San Diego, CA 92182 - USA
[4] Univ Estadual Campinas, UNICAMP, Inst Phys Gleb Wataghin, BR-13083859 Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Physical Review B; v. 93, n. 14 APR 15 2016.
Web of Science Citations: 6

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. (AU)

FAPESP's process: 14/19245-6 - Search for novel superconducting materials
Grantee:Renato de Figueiredo Jardim
Support type: Scholarships abroad - Research
FAPESP's process: 12/04870-7 - Studies of novel complex and advanced materials
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Research Projects - Thematic Grants
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC