Polarization properties of superlattice-structured Bi4Ti3O12-BaBi4Ti4O15 single crystals and ceramics:: Comparison with Bi4Ti3O12 and BaBi4Ti4O15

被引：40
作者：
Kobayashi, T
Noguchi, Y
Miyayama, M
机构：
[1] Univ Tokyo, Inst Ind Sci, Minato Ku, Tokyo 1538505, Japan
[2] JST, PRESTO, Meguro Ku, Tokyo 1538505, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2004年 / 43卷 / 9B期
关键词：
bismuth layer-structured ferroelectrics; single crystals; ceramics; superlattice structure; intergrowth structure; lattice distortion;
D O I：
10.1143/JJAP.43.6653
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Superlattice-structured Bi4Ti3O12-BaBi4Ti4O15 (BiT-BBTi) ceramics and single crystals were prepared, and their crystal structure and polarization properties were compared with those of constituent BiT and BBTi. The Curie temperature (T-C) of the BiT-BBTi crystals was 540degreesC, which was 40degreesC higher than that of the BiT-BBTi ceramics with the stoichiometric composition. The BiT-BBTi ceramics had a remanent polarization (P-r) of 12muC/cm(2), while the spontaneous polarization (P-s) along the a axis of the BiT-BBTi crystals was 52 muC/cm(2), which was larger than those of BiT and BBTi crystals. The large PS observed for the BiT-BBTi crystals is suggested to originate from the ferroelectric displacements of the Bi of Bi2O2 layers as well as from the Bi substitution for Ba induced by compositional deviation.
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页码：6653 / 6657
页数：5
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