Enhanced spontaneous polarization in superlattice-structured Bi4Ti3O12-BaBi4Ti4O15 single crystals -: art. no. 012907
Enhanced spontaneous polarization in superlattice-structured Bi4Ti3O12-BaBi4Ti4O15 single crystals -: art. no. 012907
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DOI：
10.1063/1.1847693
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发表时间：
2005-01-03
影响因子：
4
通讯作者：
Miyayama, M
中科院分区：
文献类型：
--
作者：
Kobayashi, T;Noguchi, Y;Miyayama, M
由Bi 4 Ti 3 O 12（BiT）和BaBi 4 Ti4 O 15（BBTi）组成的超晶格结构的铁电单晶已被报道显示出大的自发极化以及足够的绝缘性能。X射线衍射和透射电子显微镜观察的晶体显示的超晶格结构与交替堆叠的BiT和BBTi层。BiT-BBTi晶体的居里温度（T-C）为约540 ℃，其介于BiT（675 ℃）和BBTi（410 ℃）的居里温度之间。沿a（B）轴沿着的BiT-BBTi晶体的极化测量表明，自发极化为52 μ C/cm（2），这大于BiT和BBTi晶体的自发极化。(C)2005年美国物理学会。
Superlattice-structured ferroelectric single crystals composed of Bi4Ti3O12 (BiT) and BaBi4Ti4O15 (BBTi) have been reported to show a large spontaneous polarization as well as a sufficient insulating property. X-ray diffraction and transmission electron microscopy observations of the crystals revealed a superlattice structure with alternate stacking of the BiT and the BBTi layers. The Curie temperature (T-C) of the BiT-BBTi crystals was about 540 degreesC, which was intermediate between those of BiT (675 degreesC) and BBTi (410 degreesC). Polarization measurements of the BiT-BBTi crystals along the a(b) axis demonstrate that the spontaneous polarization was 52 muC/cm(2), which is larger than those of the BiT and BBTi crystals. (C) 2005 American Institute of Physics.