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.

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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