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

0551247 - FZÚ 2023 RIV DE eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR(CZ) GF20-20326L
Institucionální podpora: RVO:68378271
Klíčová slova: relaxor ferroelectrics * barium titanate * ceramics * energy storage
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 6.2, rok: 2022
Způsob publikování: 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.
Trvalý link: http://hdl.handle.net/11104/0330423