Synthesis of Perovskite-Type BiScO3 Ceramics and their Dielectric and Infrared Characterization

Alexandr Serovaiskii; Vladimir G Kutcherov; Vladimir A Vinokurov; Sergei G Serebryakov; Vasily G Trotsenko; Elena S Zhukova; Alexander A Bush; Arkady A Shanenko; Andrey S Vasenko; Vasily S Stolyarov; Vladislav I Kozlov

doi:10.1021/acs.jpclett.2c02898

Synthesis of Perovskite-Type BiScO₃ Ceramics and their Dielectric and Infrared Characterization

J Phys Chem Lett. 2022 Nov 3;13(43):10114-10119. doi: 10.1021/acs.jpclett.2c02898. Epub 2022 Oct 21.

Authors

Affiliations

¹ Gubkin Russian State University of Oil and Gas (National Research University), Leninsky avenue 65/1, Moscow119991, Russia.
² KTH Royal Institute of Technology, Lindstedtsvägen 30, Stockholm11428, Sweden.
³ Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny141700, Russia.
⁴ UFR Sciences, Université Paris-Saclay, 15 rue Georges Clemenceau, Orsay cedex91405, France.
⁵ Research Institute of Solid-State Electronics Materials, MIREA - Russian Technological University (RTU MIREA), 78 Vernadsky prospect, Moscow119454, Russia.
⁶ HSE University, 20 Myasnitskaya ulitsa, Moscow101000, Russia.
⁷ Center for Advanced Mesoscience and Nanotechnology, Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny141700, Russia.
⁸ Kapitza Institute for Physical Problems, Russian Academy of Sciences, ul. Kosygina 2, Moscow117339, Russia.

PMID: 36269349
DOI: 10.1021/acs.jpclett.2c02898

Abstract

BiScO₃ compound was obtained in the form of dense ceramic with a perovskite-type structure, and its complex characterization was determined for the first time. The corresponding synthesis procedure is described in detail. It is demonstrated that the temperature region of the phase stability at atmospheric pressure lies at T < 700 °C (973 K). It is shown that the crystal structure of the BiScO₃ ceramic is centrosymmetric. Dielectric measurements of the synthesized sample performed at frequencies 25 Hz to 1 MHz and at temperatures 10-340 K show no changes typical for phase transition. Room-temperature infrared (30-15600 cm^-1) and Raman (90-2000 cm^-1) spectra of the prepared BiScO₃ ceramic are measured, and information on the parameters of phonon resonances is obtained. The number of infrared modes exceeds that predicted by the factor group analysis of the noncentrosymmetric space group C2. The reason for selection rules violation can be associated with the disorder of the crystal structure and local distortions induced by the lone pair of electrons of Bi³⁺.