Highly a-oriented SrBi2Ta2O9thin film on (111) Pt/TiO2/SiO2/Si substrate by eclipse pulsed laser deposition

  • Son J
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Abstract

A highly a-oriented SrBi2Ta2O9thin film with a polycrystalline structure was deposited on a preferentially oriented (111) Pt/TiO2/SiO2/Si substrate by eclipse pulsed laser deposition (PLD) method. The SrBi2Ta2O9thin film exhibited flat and smooth surface with the surface roughness of about 0.5 nm resulting from reducing particulates generated by on-axis PLD. The SrBi2Ta2O9thin film showed a good ferroelectric property with the high remanent polarization of 12 μC/cm2and the low coercive electric field of 140 kV/cm. For the highly a-oriented SBT thin film, domain switching and reading were performed by Kelvin probe force microscope (KFM). The KFM data indicate a good ferroelectric property of the highly a-oriented SrBi2Ta2O9thin film with high KFM signals that reflect ferroelectric polarizations. © 2008 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Domain switching
  • Eclipse pulsed laser deposition
  • Highly a-oriented SBT
  • Kelvin prove force microscope

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