Phase transitions and domain stabilities in biaxially strained (001) SrTiO3 epitaxial thin films

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3488636· OSTI ID:1028092

Sheng, Guang; Li, Yulan; Zhang, J X; Choudhury, S; Jia, Q X; Gopalan, Venkatraman; Schlom, Darrell G; Liu, Z K; Chen, L Q

We applied phase-field approach to investigate both ferroelectric and antiferrodistortive (AFD) transitions in (001) SrTiO3 epitaxial thin films that are strained biaxially. A domain/phase stability diagram of 'misfit strain-temperature' was constructed for equi-biaxially strained (001) SrTiO3 thin films, which exhibits significant differences from previous diagrams obtained using thermodynamic analysis of a single domain. For unequi-biaxially strained (001) SrTiO3 thin films, 'misfit strain-misfit strain' domain stability diagrams at several representative temperatures were obtained. The predicted phase transitions, domain stabilities, and domain structures in three different SrTiO3 thin films under either equi-biaxial or unequi-biaxial strains agree well with experimental observations.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1028092
• Report Number(s): PNNL-SA-74812; AF5831060
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 108; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DOMAIN STRUCTURE
Phase transitions
STABILITY
STRAINS
SrTiO3 films
THERMODYNAMICS
THIN FILMS
domain stabilities