Optical properties of Ba0.5Sr0.5TiO3thin films grown on MgO substrates by pulsed laser deposition

D. Y. Wang, Chee Leung Mak, K. H. Wong, H. L W Chan, C. L. Choy

Research output: Journal article publicationConference articleAcademic researchpeer-review

34 Citations (Scopus)

Abstract

Barium strontium titanate (Ba0.5Sr0.5TiO3or BST (50/50)) thin films were grown on MgO(100) substrates using pulsed laser deposition (PLD). The surface morphology of the thin films was observed using a scanning probe microscope and the grain size was found to be around 100-150nm. The surface roughness is below 5nm for a 250nm thick film. X-ray diffraction (XRD) results revealed that the BST thin films were epitaxially grown on the MgO(100) substrates. Optical transmittance and electro-optic (E-O) properties of the BST thin films were measured using a phase modulation detection method. The BST/MgO configuration was highly transparent in the visible region. The BST film exhibited a predominantly quadratic E-O behavior and the quadratic E-O coefficient was found to be 0.42×10-17m2/V2.
Original languageEnglish
Pages (from-to)1745-1748
Number of pages4
JournalCeramics International
Volume30
Issue number7
DOIs
Publication statusPublished - 7 Sep 2004
Event3rd Asian Meeting on Electroceramics - Singapore, Singapore
Duration: 7 Dec 200311 Dec 2003

Keywords

  • BST thin films
  • Electro-optic
  • Ellipsometer

ASJC Scopus subject areas

  • Ceramics and Composites

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