Prediction of Ferroelectricity in BaTiO3/SrTiO3 Superlattices with Domains
The phase transitions of superlattices into single- and multidomain states were studied using a mesoscale phase-field model incorporating structural inhomogeneity, micromechanics, and electrostatics. While the predictions of transition temperatures of BaTiO3/SrTiO3 superlattices into multidomains show remarkably good, quantitative agreement with ultraviolet Raman spectroscopic and variable-temperature x-ray diffraction measurements, the single-domain assumption breaks down for superlattices in which the nonferroelectric layer thickness exceeds the characteristic domain size in the ferroelectric layers.
Tenne, Dmitri A.. (2007). "Prediction of Ferroelectricity in BaTiO3/SrTiO3 Superlattices with Domains". Applied Physics Letters, 91(11), 112914-1 - 112914-3. http://dx.doi.org/10.1063/1.2785121