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Aging effect in Er 3+ ‐doped 0.5Ba(Zr 0.2 Ti 0.8 )O 3 –0.5(Ba 0.7 Ca 0.3 )TiO 3 ceramics
Author(s) -
Luo Laihui,
Li Kaixuan,
Du Peng,
Wang Yaojin
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16887
Subject(s) - poling , curie temperature , materials science , tetragonal crystal system , ceramic , ferroelectricity , doping , dipole , polarization (electrochemistry) , condensed matter physics , analytical chemistry (journal) , dielectric , composite material , crystallography , optoelectronics , crystal structure , ferromagnetism , chemistry , physics , organic chemistry , chromatography
Usually, aging in poled ferroelectrics leads to degradation of certain physical properties. In this study, we found a remarkable aging effect in tetragonal Er 3+ ‐doped 0.5Ba(Zr 0.2 Ti 0.8 )O 3 –0.5(Ba 0.7 Ca 0.3 )TiO 3 (BZT‐BCT) ceramics after poling. It is observed that the domains can spontaneously rotate to keep their spontaneous polarization direction similar to that of the poling electric field during aging for the poled ceramics. Furthermore, compared with freshly poled ceramics, the thermally stimulated current (TSC) peak of the aged ones shifts toward a higher temperature (10°C). And the temperature of the TSC peak in the aged ceramics is exactly equal to their Curie temperature. Such features indicate that aging for the poled ceramics could stabilize the alignment of ordered ferroelectric domains. Additionally, a downward TSC peak above Curie temperature is obtained in both poled and aged ceramics, demonstrating that poling and aging can lead to ordered alignment of defect dipoles. The aging mechanism of poled Er 3+ ‐doped BZT‐BCT ceramics has proposed and discussed in this article.