Microstructures related to the ferroelectric properties in BiFeO3-BaTiO3
Microstructures related to the ferroelectric properties in BiFeO3-BaTiO3
复制标题
BiFeO3-BaTiO3 中与铁电性能相关的微观结构
DOI：
10.14723/tmrsj.33.27
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
S. Mori
中科院分区：
文献类型：
--
作者：
S. Kitagawa;Y. Horibe;K. Yoshii;Muneyasu Suzuki;Y. Noguchi;S. Nishihara;Y. Hosokoshi;S. Mori
（1-x）BiFeOrxBaTi0 3中与铁电（FE）性能相关的微观结构主要通过透射电子显微镜，结合传统的磁和介电测量进行了研究。发现在x=0.25的化合物中，随着BaTi0 3浓度(x)的增加，BiFe0 3中宏观尺寸的FE畴结构转变为20 ~ 30nm尺寸的精细FE微观结构。此外，由于x=0.33化合物在室温下的应变场，我们发现了典型的花呢样对比度。我们通过获取实空间图像仔细研究了x=0.25化合物中FE微畴的空间分布，并确定了每个FE微畴中自发极化的空间构型。
Microstructures related to the ferroelectric (FE) properties in (1-x)BiFeOrxBaTi0 3 were examined mainly by a transmission electron microscopy, in combination with conventional magnetic and dielectric measurements. It was found that macroscopic-sized FE domain structures in BiFe0 3 changed into fine FE microstructures with the 20-30nm size in the x=0.25 compound, as the BaTi0 3 concentration (x) was increased. In addition, we found characteristic tweed-like contrast due to the strain field in the x=0.33 compound at room temperature. We carefully investigated a spatial distribution of the FE microdomains in the x=0.25 compound by obtaining real-space images and determined the spatial configuration of the spontaneous polarization in each FE microdomains.