Crystallographic orientation-dependent piezoelectric response in BaTiO3 thin films and the domain evolution under different temperatures

Abstract

The effects of crystallographic orientation on the domain structures and piezoelectric response of BaTiO3 (BTO) thin films were investigated by piezoresponse force microscopy (PFM) systematically. It is found that the domain structures of BTO films are obviously orientation dependent, and the (111) oriented BTO film shows the best piezoelectric properties. Therefore, the nanoscale polydomain switchings within valid single grains of the BTO(111) thin film were observed by PFM under different temperatures. According to the switching process, the a1/a2c, r/a2c, and a1c/r polydomain states were specially introduced into the theoretical model to describe the temperature-induced polydomain switchings of the BTO(111) thin film. The misfit strain-temperature phase diagram was simulated to present the a1/a2c-r/a2c-a1c/r-p domain switching, which corresponds with the threshold temperature of domain switchings obtained from the experimental results of the BTO(111) thin film.

Strain-Induced Magnetoelectric Coupling in Fe3O4/BaTiO3 Nanopillar Composites

“…The butterfly-like amplitude hysteresis and saturated phase-voltage hysteresis demonstrate a ferroelectric switching. The coercive voltage is about 1 V, which is lower than that of continuous BTO films. , The smaller coercive field means that the ferroelectric polarization of BTO nanopillars is easier to be switched by the electric field. In BTO nanopillars, the clamping effect from the substrate is limited; meanwhile, domain switching shows a lower energy barrier.…”

“…The coercive voltage is about 1 V, which is lower than that of continuous BTO films. 39, 40 The smaller coercive field means that the ferroelectric polarization of BTO nanopillars is easier to be switched by the electric field.…”

Enhanced Energy Density at a Low Electric Field in PVDF-Based Heterojunctions Sandwiched with High Ion-Polarized BTO Films

“…More importantly, the nanosheets are randomly distributed in polymer without utilizing the preferred orientation to enhance the energy storage density. For example, (100)-oriented BaTiO 3 (BTO) films exhibit the higher D max originated from ion displacement polarizations compared with (111)-oriented, , which is a suitable filler to realize high U at low E in inorganic/organic composites. Therefore, it is meaningful research to synthesize polymer-based heterojunctions sandwiched with larger-sized (100)-oriented BTO films achieving high U at low E .…”