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Type: Artigo de periódico
Title: Temperature dependence of the Cr3+ site axial distortion in LiSrAlF6 and LiSrGaF6 single crystals
Author: Medina, AN
Bento, AC
Baesso, ML
Gandra, FG
Catunda, T
Cassanho, A
Abstract: The electron spin resonance (ESR) of Cr3+ in LiSrAlF6 (LiSAF:Cr) and LiSrGaF6 (LiSGaF:Cr) single crystals has been measured in the temperature range between 270 and 470 K. The external magnetic field orientation dependence of the spectra is described by a spin Hamiltonian of axial symmetry for both compounds. The value of the zero-field splitting axial parameter (D) for LiSGaF:Cr decreases from 6.60 x 10(-2) cm(-1) to 5.60 x 10(-2) cm(-1), while for LiSAF:Cr it increases from 1.30 x 10(-2) cm(-1) to 1.60 x 10(-2) cm(-1) for increasing temperature. The larger values of D obtained for LiSGaF:Cr show that the distortion of the octahedral Cr site is greater in this compound, in agreement with x-ray diffraction results reported in the literature.
Country: Inglaterra
Editor: Iop Publishing Ltd
Citation: Journal Of Physics-condensed Matter. Iop Publishing Ltd, v. 13, n. 36, n. 8435, n. 8443, 2001.
Rights: fechado
Identifier DOI: 10.1088/0953-8984/13/36/315
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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