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Orientation Control and Dielectric Properties of Sol-gel Deposited (Ba,Sr)TiO3 Thin Films for Room-temperature Tunable Element Applications

Zhai, Jiwei   (Department of Physics and Materials Science, City University of Hong Kowloon  ); Chen, Haydn   (Department of Physics and Materials Science, City University of Hong Kowloon  );
  • 초록

    The effects of the mole concentrations of precursor solution on the microstructure and dielectric properties of sol-gel deposited $Ba_{0.85}$ S $r_{0.15}$ Ti $O_3$ (BST) thin films have been investigated. The films were of single perovskite phase with strong (100) preferred orientation when grown on LaNi0 $_3$ buffered Pt/Ti/ $SiO_2$ Si substrates using a diluted precursor solution. Variation of the precursor solution concentration resulted in a different microstructure and, in turn, affected the tunability of the sol-gel deposited films. It was observed that leakage currents increased asymmetrically for the negative and positive bias voltage with decreasing thickness. Overall results suggest that those BST films have acceptable properties f3r applications as room-temperature tunable elements.


  • 주제어

    $BaSrTiO_3$ .   Thin film .   Tunability .   Sol-gel deposition .   Orientation.  

  • 참고문헌 (16)

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