Open AccessDielectric properties of bismuth-containing pyrochlores: A comparative analysis
Author(s) -
М. В. Таланов,
Е. В. Глазунова,
В. И. Козлов,
С. П. Кубрин,
А. А. Буш,
В. М. Таланов,
К. Е. Каменцев
Publication year - 2021
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x21600171
Subject(s) - pyrochlore , dielectric , materials science , bismuth , condensed matter physics , relaxation (psychology) , permittivity , ceramic , arrhenius equation , electric field , thermodynamics , chemistry , physics , quantum mechanics , composite material , phase (matter) , metallurgy , optoelectronics , activation energy , psychology , social psychology
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 [Formula: see text][Formula: see text][Formula: see text][Formula: see text] ceramics with chemical disorder in both A and B cation sublattices and Bi 2 Ti 2 O 7 single crystal with fully chemical ordered structure. The fundamental differences between the dielectric properties of the BZN ceramics and Bi 2 Ti 2 O 7 single crystal were shown. In particular, in the dielectric relaxation behavior (which cannot be described via Arrhenius law in the Bi 2 Ti 2 [Formula: see text] 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 Bi 2 Ti 2 O 7 below estimated freezing temperature). The results of this study highlights the special role of Bi 2 Ti 2 O 7 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.