Enhanced energy storage performance in BaZrTiOlead-free ferroelectrics near phase transitions.

The present study explores the energy storage properties of BaZrTi1-xOthrough phase-field modeling, focusing on the impact of composition and temperature on energy storage performance. The obtained results reveal a variety of polarization phases and configurations based on Zr compositions and temperatures. A detailed phase diagram for temperature-composition of BaZrTi1-xOis established, closely aligning with experimental measurements.

Relaxor-Ferroelectric Films for Dielectric Tunable Applications: Effect of Film Thickness and Applied Electric Field.

The dielectric properties, tunability and figure-of-merit () of relaxor PbLa(ZrTi)O (PLZT) films have been investigated. Dielectric measurements indicated that the dielectric constant (at zero-bias field), tunability and are enhanced as the film thickness increases, which are mainly attributed to the presence of an interfacial layer near the film-electrode interface. Experimental results illustrated that a slight reduction is observed in both dielectric constant and tunability (-2%) in a wide-frequency range (10 kHz-1 MHz); meanwhile, the value decreases significantly (-17%) with increasing frequency, arising from the higher dielectric loss value.

Use of Potentially Inappropriate Medications in People With Dementia in Vietnam and Its Associated Factors.

This study examined the use of potentially inappropriate medicines that may affect cognition (PIMcog) in people with dementia and its associated factors. Medical records of all outpatients with dementia attending a tertiary hospital in Vietnam between January 1, 2015, and December 31, 2016, were examined. Medicine use was assessed against a list of PIMcog.