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Electric field‐revealed precursor ferroelectric properties of low lithium ion‐doped KTaO 3
Author(s) -
Trybuła Zbigniew,
Miga Seweryn,
Łoś Szymon,
Trybuła Małgorzata,
Dec Jan
Publication year - 2016
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201552468
Subject(s) - ferroelectricity , electric field , polarization (electrochemistry) , condensed matter physics , materials science , ion , polarization density , doping , electric susceptibility , atmospheric temperature range , analytical chemistry (journal) , dielectric , chemistry , physics , optoelectronics , thermodynamics , magnetization , magnetic field , organic chemistry , chromatography , quantum mechanics
The results of low‐temperature linearχ 1 ′as well as nonlinearχ 2 ′andχ 3 ′electric susceptibility and polarization P measurements of the K 1– x Li x TaO 3 , x = 0.01 crystal are presented. A coexistence of two different phases within a temperature range where the glassy state sets in is proposed. In the current work, we have proved the existence of an electric field‐revealed precursor ferroelectric phase without low‐frequency relaxation. With decreasing temperature, the second‐order nonlinear electric susceptibility,χ 2 ′ , which is proportional to the polarization P , increases from zero at about 40 K toχ 2 ′ = 1.25 × 10 − 4m · V − 1at 4.2 K. This behavior is independent of the frequency of the ac probing electric field, and thus discloses the existence of a newly observed polarization component.