Elastic deformations during phase transition in freestanding BaTiO3 thin films

Jaya P. Nair; Natalie Stavitski; Ilya Zon; Konstantin Gartsman; Igor Lubomirsky

Elastic deformations during phase transition in freestanding BaTiO3 thin films

Jaya P. Nair, Natalie Stavitski, Ilya Zon, Konstantin Gartsman, Igor Lubomirsky

Weizmann Institute of Science, Israel

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Elastic deformations during phase transition in freestanding BaTiO₃ thin films were investigated. BaTiO₃ films were prepared by sol-gel technique or RF magnetron sputtering on silicon substrates, covered by randomly oriented 120 nm thick Al₂O₃. The as-deposited films were under tensile stress of 100-170 MPa and did not show neither pyroelectric nor piezoelectric properties. Partial substrate removal caused the freestanding films to expand laterally by 0.3-0.5% and corrugate. Dielectric constant of the freestanding films (620±10) was found to be significantly higher than that of the substrate supported films (110±20). The freestanding films showed detectable piezoelectric effect, which indicated that the lateral expansion was originated from the substrate-suppressed cubic-tetragonal phase transition.

Original language	English
Title of host publication	Materials Research Society Symposium - Proceedings
Editors	R Wentzcovitch, A Navrotsky, K Poeppelmeier
Pages	245-250
Number of pages	6
Volume	718
Publication status	Published - 2002
Event	Perovskite Materials - San Francisco, CA, United States Duration: Apr 1 2002 → Apr 5 2002

Other

Other	Perovskite Materials
Country	United States
City	San Francisco, CA
Period	4/1/02 → 4/5/02

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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Nair, J. P., Stavitski, N., Zon, I., Gartsman, K., & Lubomirsky, I. (2002). Elastic deformations during phase transition in freestanding BaTiO3 thin films. In R. Wentzcovitch, A. Navrotsky, & K. Poeppelmeier (Eds.), Materials Research Society Symposium - Proceedings (Vol. 718, pp. 245-250)

Elastic deformations during phase transition in freestanding BaTiO3 thin films. / Nair, Jaya P.; Stavitski, Natalie; Zon, Ilya; Gartsman, Konstantin; Lubomirsky, Igor.

Materials Research Society Symposium - Proceedings. ed. / R Wentzcovitch; A Navrotsky; K Poeppelmeier. Vol. 718 2002. p. 245-250.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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abstract = "Elastic deformations during phase transition in freestanding BaTiO3 thin films were investigated. BaTiO3 films were prepared by sol-gel technique or RF magnetron sputtering on silicon substrates, covered by randomly oriented 120 nm thick Al2O3. The as-deposited films were under tensile stress of 100-170 MPa and did not show neither pyroelectric nor piezoelectric properties. Partial substrate removal caused the freestanding films to expand laterally by 0.3-0.5% and corrugate. Dielectric constant of the freestanding films (620±10) was found to be significantly higher than that of the substrate supported films (110±20). The freestanding films showed detectable piezoelectric effect, which indicated that the lateral expansion was originated from the substrate-suppressed cubic-tetragonal phase transition.",

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N2 - Elastic deformations during phase transition in freestanding BaTiO3 thin films were investigated. BaTiO3 films were prepared by sol-gel technique or RF magnetron sputtering on silicon substrates, covered by randomly oriented 120 nm thick Al2O3. The as-deposited films were under tensile stress of 100-170 MPa and did not show neither pyroelectric nor piezoelectric properties. Partial substrate removal caused the freestanding films to expand laterally by 0.3-0.5% and corrugate. Dielectric constant of the freestanding films (620±10) was found to be significantly higher than that of the substrate supported films (110±20). The freestanding films showed detectable piezoelectric effect, which indicated that the lateral expansion was originated from the substrate-suppressed cubic-tetragonal phase transition.

AB - Elastic deformations during phase transition in freestanding BaTiO3 thin films were investigated. BaTiO3 films were prepared by sol-gel technique or RF magnetron sputtering on silicon substrates, covered by randomly oriented 120 nm thick Al2O3. The as-deposited films were under tensile stress of 100-170 MPa and did not show neither pyroelectric nor piezoelectric properties. Partial substrate removal caused the freestanding films to expand laterally by 0.3-0.5% and corrugate. Dielectric constant of the freestanding films (620±10) was found to be significantly higher than that of the substrate supported films (110±20). The freestanding films showed detectable piezoelectric effect, which indicated that the lateral expansion was originated from the substrate-suppressed cubic-tetragonal phase transition.

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