Journal of Advanced Dielectrics, Volume. 12, Issue 2, 2160017(2022)
Dielectric properties of bismuth-containing pyrochlores: A comparative analysis
M. V. Talanov1、*, E. V. Glazunova1, V. I. Kozlov2, S. P. Kubrin1, A. A. Bush2, V. M. Talanov3, and K. E. Kamentsev2
Author Affiliations
1Research Institute of Physics, Southern Federal University, av. Stachki 193, Rostov-on-Don, 344090, Russia2Research Institute of Solid State Electronics Materials, MIREA-Russian Technological University (RTU MIREA), 5th Street of Sokolinaya Gora 22, Moscow, 119454, Russia3Technological Department, Platov South-Russian State Polytechnic University (NPI), Prosvescheniya Str. 132, Novocherkassk, 346428, Russiashow less
The comparative analysis of the dielectric properties of bismuth-containing pyrochlores with different manifestation of atomic order/disorder was carried out. We examined the dielectric properties (including behavior in electric fields) of two pyrochlore compounds: BZN (presumably a composition close to ceramics with chemical disorder in both A and B cation sublattices and Bi2Ti2O7 single crystal with fully chemical ordered structure. The fundamental differences between the dielectric properties of the BZN ceramics and Bi2Ti2O7 single crystal were shown. In particular, in the dielectric relaxation behavior (which cannot be described via Arrhenius law in the Bi2Ti2 or in the influence of the electric fields on the dielectric permittivity (splitting of the field-cooled and zero-field-cooled behaviors was observed for Bi2Ti2O7 below estimated freezing temperature). The results of this study highlights the special role of Bi2Ti2O7 as a candidate material for studying aspects of geometric frustration related with pyrochlore structure in non-magnetic medium and specifies the future directions of research.The comparative analysis of the dielectric properties of bismuth-containing pyrochlores with different manifestation of atomic order/disorder was carried out. We examined the dielectric properties (including behavior in electric fields) of two pyrochlore compounds: BZN (presumably a composition close to ceramics with chemical disorder in both A and B cation sublattices and Bi2Ti2O7 single crystal with fully chemical ordered structure. The fundamental differences between the dielectric properties of the BZN ceramics and Bi2Ti2O7 single crystal were shown. In particular, in the dielectric relaxation behavior (which cannot be described via Arrhenius law in the Bi2Ti2 or in the influence of the electric fields on the dielectric permittivity (splitting of the field-cooled and zero-field-cooled behaviors was observed for Bi2Ti2O7 below estimated freezing temperature). The results of this study highlights the special role of Bi2Ti2O7 as a candidate material for studying aspects of geometric frustration related with pyrochlore structure in non-magnetic medium and specifies the future directions of research.
