Ferroelectric properties of Sr_0.5Ba_0.5Nb₂O₆ thin films grown on a Si(001) substrate by RF cathode sputtering

Abstract

Using the RF cathode sputtering method, ferroelectric films of barium-strontium niobate Sr_0.5Ba_0.5Nb₂O₆ were synthesized on a semiconductor substrate. Their phase composition, crystal structure, nanostructure, dielectric, and ferroelectric characteristics were studied. The temperature ranges of phase transformations, the characteristic values of spontaneous polarization and coercive fields, the magnitude and nature of the change in the imaginary and real parts of the complex permittivity in the temperature range −190 ÷ 250 °C were established in the films. The reasons for the revealed regularities are discussed.

Keywords:

• Barium-strontium niobate
• ferroelectric
• tetragonal tungsten bronze
• thin films

Additional information

Funding

The work was carried out within the framework of the SSC RAS state task (project number 122020100294-9).