Observation of Surface Deformation of Ferroelectric and Ferroelastic Crystals by Atomic Force Microscopy

用原子力显微镜观察铁电和铁弹性晶体的表面变形

• 批准号: 09640406
• 负责人: TAKASHIGE Masaaki
• 金额: $ 2.5万
• 依托单位: IWAKI MEISEI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640406/
• 关键词: domain; ferroelectric; ferroelastic; atomic force microscopy; AFM; barium titanate; lead titanate; tungsten oxide; 相転移

AFM(Atomic Force Microscopy) is one of the useful methods for visualizing the surface morphology due to the ferroelectric and ferroelastic domain configurations, since the measurement is possible without any modification or damage of the sample surface in contrast to other methods such as surface etching, scanning electron microscopy, etc.In this project, we made AFM observations about surface structure of the following five crystals, BaTiO_3(BT), PbTiO_3(LT), Gd_2(MoO_4)_3(GMO), NdP_<5p>O_<14>(NDPP) and W0_3, all of which show phase transitions with alteration of the crystal system. Namely, 90 degree domain structure due to the cubic to tetragonal phase transition in BT and LT, the tetragonal to orthorhoinbic domain structure in GMO, and the orthorhombic to monoclinic domain structure in NDPP and W0_3, were visualized at room temperature, respectively. In particular, further experiments such as observation of the 90 degree domain image under application of electric field in BT, temperature-dependent triclinic-domain images in W0_3 were also made.

AFM原子力显微镜（Atomic Force Microscopy，AFM）是观察铁电和铁弹畴结构表面形貌的有效方法之一，因为与表面刻蚀、扫描电镜等方法相比，AFM可以在不对样品表面进行任何修饰或破坏的情况下进行测量。PbTiO_3（LT）、Gd_2（MoO_4）_3（GMO）、NdP_<5p>O_<14>（NDPP）和W_（03）都发生了相变，改变了晶体结构。即，在室温下，BT和LT中由于立方到四方相转变而形成的90度畴结构，GMO中四方相到正交相畴结构，以及NDPP和W0_3中正交相到单斜相畴结构分别被可视化。特别地，还进行了进一步的实验，例如观察BT中施加电场下的90度畴图像，W0_3中的温度依赖的三斜畴图像。

项目成果

M.Takashige et al.: "Surface morphology of tetragonal PbTiO_3 and BaTiO_3 obserwed by Atomic foru Microscopy" J.Phys.Soc.Jpn.66. 1848-1849 (1997)

M.Takashige 等人：“通过原子显微镜观察到的四方 PbTiO_3 和 BaTiO_3 的表面形态”J.Phys.Soc.Jpn.66。

M.Takashige et al.: "Surface Morphology of Tetragonal PbTiO_3 and BaTiO_3 Obserued by Atomic Force Microscopy" J.Phys.Soc.Jpan.66. 1848-1849 (1997)

M.Takashige 等人：“原子力显微镜观察到的四方 PbTiO_3 和 BaTiO_3 的表面形态”J.Phys.Soc.Jpan.66。

M.Takashige et al: "Surface Morphology of Ferroelectric Gd_2 (MoO_4)_3) Observed by Atomic Force Micrcroscopy" Ferroelectrics. 203. 221-225 (1997)

M.Takashige 等人：“原子力显微镜观察到的铁电 Gd_2 (MoO_4)_3) 的表面形态”铁电体。

M.Takashige et al.: "AFM Obseruation of the Ferroclectric and Farroelastic Crystals." J.Kor.Phys.Soc.(in press).

M.Takashige 等人：“铁电晶体和法弹性晶体的 AFM 观测”。

M.Takashige et al.: "Surface morphology of tetragonal PbTiO_3 and BaTiO_3 observed by atomic force microscopy" J.Phys.Soc.Jpn.66. 1848-1849 (1997)

M.Takashige等人：“原子力显微镜观察到的四方PbTiO_3和BaTiO_3的表面形貌”J.Phys.Soc.Jpn.66。