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Structural changes of relaxor ferroelectric Sr 0.52 Ba 0.48 Nb 2 O 6 (SBN52) on quenching and reheating
Author(s) -
Graetsch Heribert A.
Publication year - 2017
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
ISSN - 2052-5206
DOI - 10.1107/s2052520617007880
Subject(s) - quenching (fluorescence) , ferroelectricity , strontium , materials science , niobium , crystallography , analytical chemistry (journal) , condensed matter physics , chemistry , dielectric , fluorescence , metallurgy , physics , optics , optoelectronics , chromatography , organic chemistry
Quenching of Sr 0.52 Ba 0.48 Nb 2 O 6 (SBN52) from temperatures above 700°C causes small modifications in the strontium distribution over the large cation sites (Me1 and Me2), changed off‐centre shifts of the Nb atoms and slightly increased modulation amplitudes. The higher disorder of cation incorporation can explain the enhanced ferroelectric properties. The quenched structural disorder can be healed by reheating followed by slow cooling. A change of the modulation dimension on quenching such as for Ca x Ba 1− x Nb 2 O 6 (CBN) mixed crystals was not observed.