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Type: Artigo de periódico
Title: Structural Effects In The Epr Spectra Of Ni3+ In La2ni0.5li0.5o4
Author: Urbano R.R.
Garcia A.
Granado E.
Sanjurjo J.A.
Torriani I.
Rettori C.
Oseroff S.B.
Hassan A.
Martins G.B.
Fisk Z.
Pagliuso P.G.
Sarrao J.L.
Caciuffo R.
Ibberson R.M.
Abstract: Electron paramagnetic resonance (EPR), Raman scattering, and neutron- and x-ray-diffraction experiments were performed in polycrystalline samples of La2Ni0.5Li0.5O4 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⊥ - g∥) 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 Ni3+(3d7) 2A1g low-spin configuration in the NiO6 Jahn-Teller distorted octahedra.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.62.9593
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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