The UV-VIS diffuse reflectance and IR transmission spectra of MgO-CoO solid solutions show that the frequency of both electronic and vibrational transitions changes with x molar fraction of CoO. In particular: (i) the energy of the 4T1g(P)←4T1g(F), 4A2g(F)←4T1g(F), and 4T2g(F)←4T1g(F) transitions varies linearly with x (compression effect); (ii) the energy of the transition 4T1g→(conduction band) shows a parabolic dependence upon x; (iii) the transverse optical mode (TO) shows a one-mode vibrational behavior, whose dependence upon x is well described by the modified random isodisplacement model (MREI).

Electronic and vibrational spectra of MgO-CoO solid solutions

ZECCHINA, Adriano;SPOTO, Giuseppe;COLUCCIA, Salvatore;GARRONE, Edoardo
1984

Abstract

The UV-VIS diffuse reflectance and IR transmission spectra of MgO-CoO solid solutions show that the frequency of both electronic and vibrational transitions changes with x molar fraction of CoO. In particular: (i) the energy of the 4T1g(P)←4T1g(F), 4A2g(F)←4T1g(F), and 4T2g(F)←4T1g(F) transitions varies linearly with x (compression effect); (ii) the energy of the transition 4T1g→(conduction band) shows a parabolic dependence upon x; (iii) the transverse optical mode (TO) shows a one-mode vibrational behavior, whose dependence upon x is well described by the modified random isodisplacement model (MREI).
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http://www.scopus.com/record/display.url?eid=2-s2.0-0012096049&origin=inward&txGid=lOvbP40hU0N43lzIIqcfvow%3a2
Magnesiumm oxide; cobalt oxide; solid solutions; UV-Vis spectroscopy; IR spectroscopy
A. Zecchina; G. Spoto; S. Coluccia; E. Garrone
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/112077
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