Electrothermal Phenomena in Ferroelectrics

Surface-Stimulated Phenomena in the Polarization Response of Ferroelectrics

The integration of ferroelectrics in electronic devices requires that they be used in the form of thin films, which implies that for such systems finite-size effects related to the presence of a ferroelectric-electrode interface become important. In this thesis, a number of theoretical studies are presented on the properties of metal-ferroelectric-metal structures, focusing on the impact of the...

In situ Transmission Electron Microscopy Studies of Electric-field-induced Phenomena in Ferroelectrics

High electric fields were delivered to specimens during imaging in the transmission electron microscopy (TEM) chamber to reveal details of electric field-induced phenomena in ferroelectric oxides. These include the polarization switching in nanometer-sized ferroelectric domains and the grain boundary cavitation in a commercial lead zirconate titanate (PZT) polycrystalline ceramic, the domain wa...

Hydrogen in Ferroelectrics

Super-crystals in composite ferroelectrics

As atoms and molecules condense to form solids, a crystalline state can emerge with its highly ordered geometry and subnanometric lattice constant. In some physical systems, such as ferroelectric perovskites, a perfect crystalline structure forms even when the condensing substances are non-stoichiometric. The resulting solids have compositional disorder and complex macroscopic properties, such ...

Retarded Electromagnetic Interaction and Origin of Non-linear Phenomena in Ferroelectrics and Ferromagnetics as well as Optics

The non-linear relations between polarization strength and electric field strength for ferroelectrics, as well as magnetization strength and magnetic field strength for ferromagnetics, can be achieved by introducing the retarded electromagnetic interactions. The electric and magnetic hysteretic loops in medium frequency alternating electromagnetic fields can be described well. The basic phenome...