Copper doped zinc oxide Y2BaZnO5: ERS and optical investigation |
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Authors: | Claude Michel Bernard Raveau |
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Affiliation: | Laboratoire de Cristallographie, Chimie et Physique des Solides, L.A. 251 ISMRA-Université, 14032 Caen Cedex, France |
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Abstract: | In copper doped Y2BaZnO5 oxides, copper exhibits a distorted square pyramidal coordination which is consistant with the values of g and A tensors obtained from O band ERS spectrum for a sample containing about 1 % Cu. Three values for g and A are observed, g1 = 2.0495, g2 = 2.0515, g3 = 2.275, , and . Since an approximate C4v point symmetry can be assumed for copper. The electronic spectrum shows three bands at 11700, 14500 and 20500 cm?1 which can be assigned to the transitions A1 → B1, B2 → B1 and E → B1 respectively. The orbital reduction parameters are calculated and the bonding covalency is discussed. |
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