Ferroelectric and dielectric properties of Bi3.15Nd0.85Ti3O12 nanotubes
Ferroelectric and dielectric properties of Bi3.15Nd0.85Ti3O12 nanotubes
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DOI：
10.1063/1.3624801
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发表时间：
2011-09
影响因子：
3.2
通讯作者：
W. Cai;Xiaomei Lu;Huifeng Bo;Y. Kan;Y. Weng;Liang Zhang;Xiaobo Wu;F. Huang;L. Eng;Jinsong Zhu;F. Yan
中科院分区：
文献类型：
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作者：
W. Cai;Xiaomei Lu;Huifeng Bo;Y. Kan;Y. Weng;Liang Zhang;Xiaobo Wu;F. Huang;L. Eng;Jinsong Zhu;F. Yan
为了满足铁电存储器的高密度要求，采用溶胶凝胶法合成了外径约100 nm、壁厚约30 nm的Bi3.15Nd0.85Ti3O12铁电纳米管。透射电子显微镜图像和拉曼光谱显示了这些纳米管的双层钙钛矿结构。它们的介电常数和剩余极化与薄膜相媲美。用压电响应力显微镜测量单个纳米管的压电滞回线表明它们是不对称的，并且开关纳米管表现出长期的滞留。
In order to match the high-density requirement of ferroelectric memories, ferroelectric Bi3.15Nd0.85Ti3O12 nanotubes with outer diameter of about 100 nm and wall thickness of about 30 nm were synthesized using a sol-gel method. Transmission electron microscope images and Raman spectra revealed the Bi-layered perovskite structure of these nanotubes. Their dielectric constant and remnant polarization were comparable with those of thin film form. Piezoelectric hysteresis loops of individual nanotube measured by piezoresponse force microscope indicate their asymmetry, and the switched nanotubes show long term retention.