Annealing Effects on Bulk and Surface Properties of Lithium Niobate

ORAL

Abstract

Surface acoustic waves (SAW) on lithium niobate (LiNbO3) are being used to investigate the effects of fast strain on complex oxide thin films. Successful deposition requires annealing to achieve suitable crystallinity, motivating this study. Surface properties were investigated by depositing interdigital transducers on LiNbO3 and annealing at 500, 600, and 800 °C. Power spectrum and pulse response measurements done before and after annealing indicate that the transmitted power from the SAW degrades at 800 °C. The bulk piezoelectric coefficient was measured, before and after annealing at 800 °C, to be 17 pm/V and 21 pm/V. This improvement in the bulk performance is at odds with the surface behavior. In a related study, Sm0.60Nd0.40NiO3 (SNNO) was deposited on a wafer of LiNbO3 at a temperature of 500 °C in an atmosphere of argon and oxygen. Transmission electron microscopy measurements indicate that the SNNO was amorphous while the interfacial structure of the LiNbO3 went from a rhombohedral to a monoclinic phase. Providing an explanation for the less than optimal crystallinity of nickelate films grown on the surface.

*This work was supported by the National Science Foundation (HRD-1345163) and by the Nebraska Materials Research Science and Engineering Center (DMR-1420645).

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Presenters

  • Christopher Keck

    • Physics and Astronomy, University of Nebraska - Lincoln

Authors

  • Christopher Keck

    • Physics and Astronomy, University of Nebraska - Lincoln

  • Mario Rodriguez

    • Physics, California State University, San Bernardino

  • Uday Singh

    • Physics and Astronomy, University of Nebraska - Lincoln

  • Sara Callori

    • Physics, California State University, San Bernardino

  • Mark Koten

    • Mechanical Engineering, University of Nebraska - Lincoln

  • Jeffrey Shield

    • Mechanical Engineering, University of Nebraska - Lincoln

  • Le Zhang

    • Physics and Astronomy, Univ of Nebraska - Lincoln
    • Physics and Astronomy, University of Nebraska - Lincoln

  • Xuegang Chen

    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • Physics and Astronomy, University of Nebraska - Lincoln

  • Xia Hong

    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • Physics and Astronomy, Univ of Nebraska - Lincoln
    • Physics and Astronomy, University of Nebraska - Lincoln
    • Physics, Univ of Nebraska - Lincoln

  • Shireen Adenwalla

    • Physics and Astronomy, University of Nebraska - Lincoln
    • Department of Physics and Astronomy, University of Nebraska-Lincoln