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Type: Artigo de periódico
Title: Structural effects in the EPR spectra of Ni(3+) in La(2)Ni(0.5)Li(0.5)O(4)
Author: Urbano, RR
Garcia, A
Granado, E
Sanjurjo, JA
Torriani, I
Rettori, C
Oseroff, SB
Hassan, A
Martins, GB
Fisk, Z
Pagliuso, PG
Sarrao, JL
Caciuffo, R
Abstract: Electron paramagnetic resonance (EPR), Raman scattering, and neutron- and x-ray-diffraction experiments were performed in polycrystalline samples of La(2)N(0.5)Li(0.5)O(4) as a function of temperature. Structural studies confirm a partial cation ordering of Ni and Li at the metal sites. As the temperature decreases, EPR measurements show an increasing g-value anisotropy (g(perpendicular to)-g(parallel to)) and neutron and x-ray-diffraction experiments an increase of the c/a ratio. These results are interpreted in terms of the stabilization of the Ni(3+)(3d(7))(2)A(1g) low-spin configuration in the NiO(6) Jahn-Teller distorted octahedra.
Country: EUA
Editor: Amer Physical Soc
Citation: Physical Review B. Amer Physical Soc, v. 62, n. 14, n. 9593, n. 9598, 2000.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.62.9593
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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