Cantoni, M.Bharadwaja, S.Gentil, S.Setter, N.2006-08-212006-08-212006-08-21200410.1063/1.1785843https://infoscience.epfl.ch/handle/20.500.14299/233527WOS:0002241458000465654By means of transmission electron microscopy (TEM) the structure of chemically ordered regions in Zr-doped Pb(Mg1/3Ta2/3)O-3 has been studied. Large coherent ordered domains were obtained by the addition of 5 mol% PbZrO3. The results obtained by conventional, analytical, and high-resolution TEM are consistent with the random-site description of the B-site order, the so-called random-layer model. Image simulations showed that a careful selection of the imaging conditions for high resolution transmission electron microscopy is necessary in order to determine the different B-site occupancies. By comparison of simulated with experimental images it was possible to directly distinguish between the different ordering models. (C) 2004 American Institute of Physics.lead magnesium niobatedielectric-propertiesdomain growthpb(mg1/3nb2/3)o-3perovskitestransitionmechanismdisordersystemtext::journal::journal article::research article