BaZrO3–BaTiO3 ceramics exhibit a shift in transformation temperatures as revealed by dielectric and viscoelastic spectroscopy; a phase diagram has been established. Sigmoid anomalies in Poisson’s ratio and bulk modulus during the ferroelastic transitions were observed in doped materials, which are not predicted by standard theories for phase transformations. “Hashin–Shtrikman” composite model w...

The kinetics of hot-pressing for undoped and donor-doped BaTiO3 of high purity have been studied at 1050~ and at 2.3 to 27.6 MPa in an oxidizing atmosphere. The stress exponent and grain size exponent of the densification rate are indicative of control of densification by a grain boundary diffusion mechanism. The activation enthalpy (,~ 400 kJ mo1-1 ) for the densification process has been meas...

Highly oriented a-axis BaTiO3 thin films were grown by pulsed laser deposition on ~001! MgO substrates. The full width at half-maximum of the ~200! BaTiO3 rocking curve was as narrow as 0.6°. A large hysteretic quadratic electro-optic effect was observed in a transverse geometry at 6328 Å. A birefringence shift up to 3310 was measured at an applied dc electric field of 1 kV/mm. It was found tha...

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We theoretically investigate the interfacial magnetoelectric effect in BaTiO3/Ni heterostructure. find that coupling, specifically, dependence of magnetic moment Ni on polarization direction, primarily stems from flow screening charge into BaTiO3 with a minor contribution coming chemical bonding. The estimated change respect to bulk is as high ∼7%, which significant modulation. also examine eff...