Raman Spectroscopy of Co-Doped ZnO Bulk Crystals
W. Szuszkiewicz a, J.F. Morhange b, Z. Gołacki a, A. Łusakowski a, M. Schumm c and J. Geurts c
a Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warszawa, Poland
b Institut des Nanosciences de Paris, UPMC, 140 rue de Lourmel, 75015 Paris, France
c Physikalisches Institut der Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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Received: 9 06 2007;
Low-temperature Raman spectra of a bulk mixed crystal Zn1-xCoxO (x = 0.016) are shown and analyzed. Besides the common modes of the ZnO host lattice, electronic transitions related to the presence of Co2+ ions at the Zn sites are observed. In spite of the low Co concentration the presence of collective excitations corresponding to Co and CoO precipitates is also revealed.
DOI: 10.12693/APhysPolA.112.363
PACS numbers: 75.50.Pp, 78.30.Fs