Epitaxially induced high temperature (>900 K) cubic-tetragonal structural phase transition in BaTiO 3 thin films

Publication Type
Journal Article
Authors
DOI
10.1063/1.1812579
Abstract
For (001) coriented BaTiO 3 thin films, it has been found that epitaxial constraint can result in a dramatic increase in the temperature of a tetragonal (T) structural phase transition. For 2000-Å-thick films grown directly on SrTiO 3 substrates, a T → cubic (C) phase transition was found on heating at >950 K, where the lattice constant changed smoothly with temperature. It was also found for films of the same thickness that the T → C transition is nearly restored to that of bulk crystals by the use of a buffer layer, which relaxes the epitaxial constraint. These results provide evidence of an epitaxially induced high temperature structural phase transition in BaTiO 3thin films, where the ferroelectric (internal) and structural (external) aspects of the phase transition are decoupled. © 2004 American Institute of Physics.
Notes
cited By 20
Journal
Applied Physics Letters
Volume
85
Year of Publication
2004
Number
18
Pagination
4109-4111
ISSN Number
00036951
Keywords
Research Areas
Download citation