Ferroelectric Phase Transitions in Ultra-thin Films of BaTiO3

Details Ferroelectric Phase Transitions in Ultra-thin Films of BaTiO3 Ferroelectric Phase Transitions in Ultra-thin Films of BaTiO3

2007-05-24

arxiv.org/abs/0705.3504v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevLett.99.077601

We present molecular dynamics simulations of a realistic model of an ultrathin film of BaTiO$_3$ sandwiched between short-circuited electrodes to determine and understand effects of film thickness, epitaxial strain and the nature of electrodes on its ferroelectric phase transitions as a function of temperature. We determine a full epitaxial strain-temperature phase diagram in the presence of perfect electrodes. Even with the vanishing depolarization field, we find that ferroelectric phase transitions to states with in-plane and out-of-plane components of polarization exhibit dependence on thickness; it arises from the interactions of local dipoles with their electrostatic images in the presence of electrodes. Secondly, in the presence of relatively bad metal electrodes which only partly compensate the surface charges and depolarization field, a qualitatively different phase with stripe-like domains is stabilized at low temperature.

Affiliated with

Also associated with

No associations

Rating

Ferroelectric Phase Transitions in Ultra-thin Films of BaTiO3 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ferroelectric Phase Transitions in Ultra-thin Films of BaTiO3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ferroelectric Phase Transitions in Ultra-thin Films of BaTiO3 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-606005