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EPR and Optical Spectra of Cobalt in SrLaAlO 4
Author(s) -
Aleshkevych P.,
Berkowski M.,
RybaRomanowski W.,
Szymczak H.
Publication year - 2000
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200004)218:2<521::aid-pssb521>3.0.co;2-5
Subject(s) - electron paramagnetic resonance , hyperfine structure , tetragonal crystal system , crystal field theory , spectral line , ion , crystal (programming language) , single crystal , octahedral symmetry , chemistry , anisotropy , molecular physics , atomic physics , crystallography , nuclear magnetic resonance , physics , crystal structure , optics , organic chemistry , astronomy , computer science , programming language
The paramagnetic resonance and optical spectra of Co 2+ ions in SrLaAlO 4 single crystals are reported. The EPR spectrum shows one electronic transition consisting of eight hyperfine lines with anisotropic g ‐factor and nearly isotropic hyperfine interaction constant. A tetragonal distortion of the octahedral crystal field acting on Co 2+ ions has been found. The optical spectrum consists of intensive lines corresponding to transition Δ S = 0 and weak intercombination lines. In the weak‐field coupling scheme satisfactory agreement is obtained between the observed and calculated spectrum with Dq = 1030 cm —1 and Racah parameter B = 810 cm —1 . Both the optical and EPR data indicate a covalent bonding of Co 2+ to the nearest oxygen atoms.