Abstract
ABSTRACTThin films of Pb(Mg,Zn)1/3Nb2/3O3 were fabricated by spin casting the Pb-Mg-Zn-Nb-0 complex alkoxide sols on (111)Pt-coated MgO (100) planes. It was observed that the rheological characteristics of sol greatly influenced the orientation of perovskite grains after thin-film formation. A strong preferential orientation of (100)-type planes of the perovskite grains was obtained in the thin films derived from the sols exhibiting pseudoplastic behavior. Small angle X-ray scattering experiment in the Porod region was performed to correlate the observed preferential orientation with the network structure of precursors at various stages of aging. It was shown that weakly branched precursor chains led to highly oriented grains after thin-film formation.
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