Lattice Dynamics of Laser Excited Ferroelectric BaTiO3

DYNAMICS OF FERROELECTRIC NANO CLUSTER IN BaTiO3 OBSERVED AS A REAL TIME CORRELATION BETWEEN TWO SOFT X-RAY LASER PULSES

We carry out a theoretical investigation to clarify the dynamic property of photo-created nano-sized ferroelectric cluster observed in the paraelectric BaTiO3 as a real time correlation of speckle pattern between two soft X-ray laser pulses, at just above the paraelectricferroelectric phase transition temperature. Based on a model with coupled soft X-ray photon and ferroelectric phonon mode, we...

Inverse barocaloric effects in ferroelectric BaTiO3 ceramics

Periodic Slab LAPW Computations for Ferroelectric BaTiO3

Linearized augmented plane wave (LAPW) calculations are performed for periodic (001) and (111) slabs of BaTiO3 to understand the effects of surfaces on ferroelectric BaTiO3. The (111) slab is found to be much less stable than the (001) slab. The average surface energies are respectively 3700 erg/cm and 1600 erg/cm. The depolarization field is sufficiently large in the ideal unrelaxated slab to ...

Ultrafast dynamics of laser-excited solids

Ultrafast dynamical processes in solids may be triggered, studied and even manipulated with help of ultrashort laser pulses. Also for materials processing there is an enormous potential of ultrashort laser pulses. Thus, femtosecond laser–solid interaction is of significant interest to the fields of both basic research and industrial applications. Here, I present results of theoretical considera...

Electric field and surface charge effects on ferroelectric domain dynamics in BaTiO3 single crystal

D. Y. He,1 L. J. Qiao,1,* Alex A. Volinsky,1,2 Y. Bai,1 and L. Q. Guo1 1Corrosion and Protection Center, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, People’s Republic of China 2Department of Mechanical Engineering, University of South Florida, Tampa, Florida 33620, USA (Received 24 December 2010; revised manuscript received 5 Ma...