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Title: The Influence of Anisotropic Strain on the Dielectric and Ferroelectric Properties of SrTiO3 Thin Films on DyScO3 Substrates

Abstract

The in-plane dielectric and ferroelectric properties of coherent anisotropically strained SrTiO{sub 3} thin films grown on orthorhombic (101) DyScO{sub 3} substrates were examined as a function of the angle between the applied electric field and the principal directions of the substrate. The dielectric permittivity revealed two distinct maxima as a function of temperature along the [100]{sub p} and [010]{sub p} SrTiO{sub 3} pseudocubic directions. These data, in conjunction with optical second-harmonic generation, show that the switchable ferroelectric polarization develops first predominantly along the in-plane axis with the larger tensile strain before developing a polarization component along the perpendicular direction with smaller strain as well, leading to domain twinning at the lower temperature. Finally, weak signatures in the dielectric and second-harmonic generation response were detected at the SrTiO{sub 3} tilt transition close to 165 K. These studies indicate that anisotropic biaxial strain can lead to new ferroelectric domain reorientation transitions that are not observed in isotropically strained films.

Authors:
 [1];  [2];  [2];  [2];  [3];  [3];  [2];  [4];  [5];  [1]
  1. ORNL
  2. Pennsylvania State University
  3. Pennsylvania State University, University Park, PA
  4. Institute for Crystal Growth, Berlin, Germany
  5. Argonne National Laboratory (ANL)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Center for Nanophase Materials Sciences
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
967112
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 79; Journal Issue: 22; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DIELECTRIC MATERIALS; ELECTRIC FIELDS; HARMONIC GENERATION; PERMITTIVITY; POLARIZATION; STRAINS; SUBSTRATES; THIN FILMS; TWINNING; Ferroelectric SrTiO3 strain anisotropy

Citation Formats

Biegalski, Michael D, Trolier-McKinstry, Susan, Schlom, Darrell, Kumar, Amit, Sheng, Guang, Vlahos, Eftihia, Chen, Long-Qing, Uecker, Rinhold, Streiffer, Stephen, and Gopalan, Venkatraman. The Influence of Anisotropic Strain on the Dielectric and Ferroelectric Properties of SrTiO3 Thin Films on DyScO3 Substrates. United States: N. p., 2009. Web. doi:10.1103/PhysRevB.79.224117.
Biegalski, Michael D, Trolier-McKinstry, Susan, Schlom, Darrell, Kumar, Amit, Sheng, Guang, Vlahos, Eftihia, Chen, Long-Qing, Uecker, Rinhold, Streiffer, Stephen, & Gopalan, Venkatraman. The Influence of Anisotropic Strain on the Dielectric and Ferroelectric Properties of SrTiO3 Thin Films on DyScO3 Substrates. United States. doi:10.1103/PhysRevB.79.224117.
Biegalski, Michael D, Trolier-McKinstry, Susan, Schlom, Darrell, Kumar, Amit, Sheng, Guang, Vlahos, Eftihia, Chen, Long-Qing, Uecker, Rinhold, Streiffer, Stephen, and Gopalan, Venkatraman. Thu . "The Influence of Anisotropic Strain on the Dielectric and Ferroelectric Properties of SrTiO3 Thin Films on DyScO3 Substrates". United States. doi:10.1103/PhysRevB.79.224117.
@article{osti_967112,
title = {The Influence of Anisotropic Strain on the Dielectric and Ferroelectric Properties of SrTiO3 Thin Films on DyScO3 Substrates},
author = {Biegalski, Michael D and Trolier-McKinstry, Susan and Schlom, Darrell and Kumar, Amit and Sheng, Guang and Vlahos, Eftihia and Chen, Long-Qing and Uecker, Rinhold and Streiffer, Stephen and Gopalan, Venkatraman},
abstractNote = {The in-plane dielectric and ferroelectric properties of coherent anisotropically strained SrTiO{sub 3} thin films grown on orthorhombic (101) DyScO{sub 3} substrates were examined as a function of the angle between the applied electric field and the principal directions of the substrate. The dielectric permittivity revealed two distinct maxima as a function of temperature along the [100]{sub p} and [010]{sub p} SrTiO{sub 3} pseudocubic directions. These data, in conjunction with optical second-harmonic generation, show that the switchable ferroelectric polarization develops first predominantly along the in-plane axis with the larger tensile strain before developing a polarization component along the perpendicular direction with smaller strain as well, leading to domain twinning at the lower temperature. Finally, weak signatures in the dielectric and second-harmonic generation response were detected at the SrTiO{sub 3} tilt transition close to 165 K. These studies indicate that anisotropic biaxial strain can lead to new ferroelectric domain reorientation transitions that are not observed in isotropically strained films.},
doi = {10.1103/PhysRevB.79.224117},
journal = {Physical Review B},
issn = {1098-0121},
number = 22,
volume = 79,
place = {United States},
year = {2009},
month = {1}
}