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Special Section on the 2020 International Conference on Physics and Mechanics of New Materials and Their Applications (PHENMA-2020): Part 3 – Guest Editors: Ivan A. Parinov, Shun-Hsyung Chang, Yun-Hae Kim and Nao-Aki NodaOpen Access

Dielectric properties of bismuth-containing pyrochlores: A comparative analysis

    https://doi.org/10.1142/S2010135X21600171Cited by:3 (Source: Crossref)

    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 Bi1.5Bi1.5Zn0.5Nb1.5O6.5) 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 Bi2Ti2O7) 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.