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[en] Highlights: • Dielectric constant vs temperature data are analyzed by multiple Gaussian peaks. • Samples show ferro-paraelectric and two magnetic order induced phase transitions. • The relaxation mechanisms exhibit a +ve frequency shift with increase in temperature. • Samples exhibit multiferroic characteristics with tunable M-E coefficient.
[en] Barium zirconate was prepared by liquid phase sintering at low temperatures and used as a substrate for a YBCO melt process. The liquid phase was provided by barium cuprate melt, barium peroxide melt or barium zirconate liquid (in case of plasma spraying). The infiltration resistance against the barium cuprate melt could be improved, but is not yet sufficient for application. (orig.)
[en] The structure of BaVs/sb3/, as refined from X-ray single-crystal data to an R factor of 0.011, is compared to the structure of the same compound obtained from neutron powder data (Rsb(ro) = 6.82, Rsb(psilon) = 4.09). As expected, the X-ray standard deviations of the positional and thermal parameters are smaller than the corresponding neutron standard deviations. However, the dynamical disorder deduced from the anomalously large thermal vibrations of the vanadium atoms obtained from the X-ray data is also evidenced by the neutron refinement. On the other hand, the neutron standard deviations of the lattice parameters are smaller than the X-ray counterparts
[en] We present ab initio calculations of the longitudinal flexoelectricity for BaTiO3 and SrTiO3 using a direct approach. The calculated value for SrTiO3 agrees with recently reported measurements. For BaTiO3, however, the theoretical values are smaller than the measured ones; possible reasons for the discrepancy are discussed. (fast track communication)