Electro-optic properties of epitaxial Sr0.6Ba 0.4Nb2O6 films grown on MgO substrates using LixNi2-xO buffer layer

X. T. Li, P. Y. Du, H. Ye, Chee Leung Mak, K. H. Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

Textured LixNi2-xO (LNO) thin films have been fabricated on (001)MgO substrates by pulsed laser deposition technique. The as-deposited LNO films shows a conductivity of 2.5×10-3 Ω∈m and possess a transmittance of about 35% in the visible region. Subsequent deposition of Sr0.6Ba0.4Nb2O 6 (SBN60) thin film on these LNO-coated MgO substrates resulted in a textured SBN layer with a 001 orientation perpendicular to the substrate plane. Phi scans on the (221) plane of the SBN layer indicated that the films have two in-plane orientations with respect to the substrate. The SBN unit cells were rotated in the plane of the film by ±∈8.2° as well as ±∈45° with respect to the LNO/MgO substrate. Besides the highly (00l)-orientation, the SBN films also exhibited a dense microstructure as shown by scanning electron microscopy. The electro-optic coefficient (r33) of the SBN film was measured to be 186 pm/V. On the basis of our results, we have demonstrated that the LNO film can be used as a buffer layer as well as a transparent bottom electrode for waveguide applications. The SBN/LNO heterostructure is also a suitable candidate for integrated electro-optics devices.
Original languageEnglish
Pages (from-to)397-400
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume92
Issue number2
DOIs
Publication statusPublished - 1 Aug 2008

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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