Electrical properties and poling of BaTiO3 thin films

H. A. Lu*, L. A. Wills, B. W. Wessels

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Dielectric and ferroelectric properties were measured for both highly a-axis textured and randomly oriented BaTiO3 thin films deposited on Pt coated MgO substrates via metal-organic chemical-vapor deposition. Dielectric constants on the order of ε∼10 and an absence of ferroelectric hysteresis were generally observed for the as-deposited films. Upon applying an electric field exceeding a threshold value of ∼50-100 kV/cm across the film, both the dielectric constant and the ferroelectric hystersis were enhanced significantly as a result of poling. The dielectric constant increased to ε∼100, and the spontaneous polarization of the a-axis textured film reached Ps≥15 μC/cm2. The measured dielectric and ferroelectric properties of the BaTiO3 thin films depended on the microstructure of the films.

Original languageEnglish (US)
Pages (from-to)2973-2975
Number of pages3
JournalApplied Physics Letters
Volume64
Issue number22
DOIs
StatePublished - 1994

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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