TF022 - Grain size effects of A:B site ratio in BaTiO3 thin films

P. R. Daniels, S. Aygun, J. F. Ihlefeld, W. Borland, Jon-Paul Maria

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

BaTiO3 films with thickness ∼1 micron were deposited on Pt and Cu foil substrates via a CSD process with varying A:B site ratios and were fired at temperatures ranging from 900 to 1200°C. The intent of this study is to determine the impact of A:B site ratio on phase assembly, grain growth, morphology, and film density. Films with excess Barium, up to 5%, fired at and above 1000°C exhibited grain sizes exceeding 5 microns with uniform and isotropic morphology. Films with excess Barium showed no formation of a secondary phase via XRD at 1100°C but a secondary phase was present at 1200°C with barium excess exceeding 4%. For films with large Ba excess and grain sizes in excess of 1 μm there is no evidence of tetragonality. Electrical testing as a function of voltage and temperature revealed room temperature permittivities of 4000 and tunability greater than 13:1 at 35V applied bias for Ba excess of 3%. Though more thorough research is needed, these results suggest that tuning the Ba:Ti ratio presents possibilities for dielectric property engineering in BaTiO3.

Original languageEnglish (US)
Title of host publication17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
DOIs
StatePublished - Dec 1 2008
Event17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008 - Santa Fe, NM, United States
Duration: Feb 23 2008Feb 28 2008

Publication series

NameIEEE International Symposium on Applications of Ferroelectrics
Volume2

Other

Other17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
CountryUnited States
CitySanta Fe, NM
Period2/23/082/28/08

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Daniels, P. R., Aygun, S., Ihlefeld, J. F., Borland, W., & Maria, J-P. (2008). TF022 - Grain size effects of A:B site ratio in BaTiO3 thin films. In 17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008 [4693862] (IEEE International Symposium on Applications of Ferroelectrics; Vol. 2). https://doi.org/10.1109/ISAF.2008.4693862