Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Electrical response of lithium niobate and lithium tantalate thin films to modulated thermal radiation

S.I. Gudkov1, A.V. Solnyshkin1, R.N. Zhukov2, D.A. Kiselev2

1 Tver State University
2 National University of Science and Technology «MISiS»

DOI: 10.26456/pcascnn/2022.14.082

Original article

Abstract: In this work, we studied the pyroelectric activity of thin polycrystalline lithium niobate films fabricated by radio frequency magnetron sputtering and laser ablation, and thin polycrystalline lithium tantalate films fabricated by radio frequency magnetron sputtering. Using the dynamic method of studying the pyroelectric effect, it was found that all samples have self-polarization that occurs during the post-growth thermal annealing of the structure. An estimate of the pyroelectric coefficient showed that the values of the pyroelectric coefficient of lithium niobate and lithium tantalate thin films are several times lower than the values of the pyroelectric coefficient for bulk crystals of the corresponding materials. This may be due to the fact that the polarization vector of some grains lies in the film plane, as well as to the traps existing in the film volume and at the film/substrate interface, on which charge carriers recombine and do not participate in the generation of the pyroelectric current.

Keywords: lithium niobate, lithium tantalate, thin film, dynamic method, self-polarization, pyroelectric effect, pyroelectric coefficient, LiNbO3, LiTaO3, ferroelectric, laser ablation method, radio frequency magnetron sputtering

  • Sergey I. Gudkov – 4th year postgraduate student, Assistant, Condensed Matter Physics Department, Tver State University
  • Alexander V. Solnyshkin – Dr. Sc., Professor, Condensed Matter Physics Department, Tver State University
  • Roman N. Zhukov – Researcher, Laboratory of Physics of Oxide Ferroelectrics, National University of Science and Technology «MISiS»
  • Dmitry A. Kiselev – , National University of Science and Technology «MISiS»


Gudkov, S.I. Electrical response of lithium niobate and lithium tantalate thin films to modulated thermal radiation / S.I. Gudkov, A.V. Solnyshkin, R.N. Zhukov, D.A. Kiselev // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2022. — I. 14. — P. 82-91. DOI: 10.26456/pcascnn/2022.14.082. (In Russian).

Full article (in Russian): download PDF file


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