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Author Bai, Gang ♦ Xie, Qiyun ♦ Liu, Zhiguo ♦ Wu, Dongmei
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CURIE POINT ♦ EPITAXY ♦ FERROELECTRIC MATERIALS ♦ LEAD ♦ NONLINEAR PROBLEMS ♦ PERMITTIVITY ♦ PHASE TRANSFORMATIONS ♦ PIEZOELECTRICITY ♦ POLARIZATION ♦ PZT ♦ SILICON ♦ STRESSES ♦ STRONTIUM TITANATES ♦ SUBSTRATES ♦ TEMPERATURE RANGE 0273-0400 K ♦ THERMODYNAMIC MODEL ♦ THIN FILMS
Abstract A nonlinear thermodynamic formalism has been proposed to calculate the physical properties of the epitaxial SrTiO{sub 3} films containing vertical nano-pillar array on Si-substrate. The out-of-plane stress induced by the mismatch between film and nano-pillars provides an effective way to tune the physical properties of ferroelectric SrTiO{sub 3} films. Tensile out-of-plane stress raises the phase transition temperature and increases the out-of-plane polarization, but decreases the out-of-plane dielectric constant below Curie temperature, pyroelectric coefficient, and piezoelectric coefficient. These results showed that by properly controlling the out-of-plane stress, the out-of-plane stress induced paraelectric-ferroelectric phase transformation will appear near room temperature. Excellent dielectric, pyroelectric, piezoelectric properties of these SrTiO{sub 3} films similar to PZT and other lead-based ferroelectrics can be expected.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-08-21
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 7


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