Origin of relaxor behavior in barium-titanate-based lead-free perovskites

0551247 - FZÚ 2023 RIV DE eng J - Journal Article
Veerapandiyan, V. - Popov, M.N. - Mayer, F. - Spitaler, J. - Svirskas, Š. - Kalendra, V. - Lins, J. - Canu, G. - Buscaglia, M. T. - Pasciak, Marek - Banys, J. - Groszewicz, P.B. - Buscaglia, V. - Hlinka, Jiří - Deluca, M.
Origin of relaxor behavior in barium-titanate-based lead-free perovskites.
Advanced Electronic Materials. Roč. 8, č. 2 (2022), č. článku 2100812. ISSN 2199-160X. E-ISSN 2199-160X
R&D Projects: GA ČR(CZ) GF20-20326L
Institutional support: RVO:68378271
Keywords : relaxor ferroelectrics * barium titanate * ceramics * energy storage
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.2, year: 2022
Method of publishing: Open access

It is well known that disordered relaxor ferroelectrics exhibit local polar correlations. The origin of localized fields that disrupt long-range polar order for different substitution types, however, is unclear. Currently, it is known that substituents of the same valence as Ti4+ at the B-site of barium titanate lattice produce random disruption of Ti-O-Ti chains that induces relaxor behavior. On the other hand, investigating lattice disruption and relaxor behavior resulting from substituents of different valence at the B-site is more complex due to the simultaneous occurrence of charge imbalances and displacements of the substituent cation. The existence of an effective charge mediated mechanism for relaxor behavior appearing at low (<10%) substituent contents in heterovalent modified barium titanate ceramics is presented in this work.
Permanent Link: http://hdl.handle.net/11104/0330423