X-ray absorption of Zn1-xCoxO thin films: A local structure study.

Authors :: Martínez-Criado, G.
Segura, A.
Sans, J. A.
Homs, A.
Pellicer-Porres, J.
Susini, J.
Source :: Applied Physics Letters; 8/7/2006, Vol. 89 Issue 6, p061906, 3p, 1 Chart, 4 Graphs
Publication Year :: 2006
Abstract: In this study, the application of synchrotron radiation microprobe to the analysis of Co incorporation in Zn<subscript>1-x</subscript>Co<subscript>x</subscript>O is reported. From the Co and Zn fluorescence line intensity ratio, the Co concentrations were deduced. A combination of fluorescence mapping with x-ray absorption spectroscopic techniques made possible to examine not only the uniform elemental distribution but also the short range structural order with the Co content. In Zn<subscript>1-x</subscript>Co<subscript>x</subscript>O films grown by pulsed laser depositions the Co atoms are in tetrahedral site configuration, corresponding to a substitutional site in wurtzite structure. Within the experimental accuracy, no significant bond length deviation from the pure ZnO structure was observed in the considered compositional range. [ABSTRACT FROM AUTHOR]