Open AccessOrdering of A-cations in lead-free oxides with a filled tetragonal tungsten bronze structure
Author(s) -
M. A. Bunin,
О. А. Бунина,
K. S. Chumachenko
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1967/1/012017
Subject(s) - tetragonal crystal system , bronze , tungsten , materials science , ferroelectricity , crystallite , crystallography , crystal structure , phase transition , condensed matter physics , metallurgy , chemistry , physics , dielectric , optoelectronics
By X-ray powder diffraction, the structure of polycrystalline lead-free oxides K 4 Bi 2 Nb l0 O 30 and Na 2 Sr 4 Nb 10 O 30 was refined with an emphasis on ordering in the A-sites of the tetragonal tungsten bronze crystal lattice. It was shown that the studied oxides have different types of cationic ordering, which does not change at ferroelectric phase transition. The results are consistent with the piezoresponse force microscopy data.