Local Piezoresponse and Thermal Behavior of Ferroelastic Domains in Multiferroic BiFeO3 Thin Films by Scanning Piezo-Thermal Microscopy  

作　　者：于会珠 陈红光 徐琨淇 赵坤宇 曾华荣 李国荣 

机构地区：[1]Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai 200050 [2]University of Chinese Academy of Sciences, Beijing 100039 [3]Shanghai Nanotechnology Promotion Center, Shanghai 200237

出　　处：《Chinese Physics Letters》2014年第10期134-137,共4页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant No 2012CB933004, the National Natural Science Foundation of China under Grant Nos 51121064 and 51402328, and the Nanotechnology Project of Shanghai Science and Technology Committee under Grant No 11nm0502800.

摘　　要：A dual probe, i.e., high resolution scanning piezo-thermal microscopy, is developed and employed to characterize the local piezoresponse and thermal behaviors of ferroelastic domains in multiferroic BiFeO3 thin films. Highly in- homogeneous piezoelectric responses are found in the thin film. A remarkably local thermal transformation across ferroelastic domain walls is clearly demonstrated by the quantitative 3w signals related to thermal conductivity. Different polarization oriented ferroelastic domains are found to exhibit different local thermal responses. The underlying mechanism is possibly associated with the inhomogeneous stress distribution across the ferroelastic domain wails, leading to different phonons scattering contributions in the BiFeO3 thin film.A dual probe, i.e., high resolution scanning piezo-thermal microscopy, is developed and employed to characterize the local piezoresponse and thermal behaviors of ferroelastic domains in multiferroic BiFeO3 thin films. Highly in- homogeneous piezoelectric responses are found in the thin film. A remarkably local thermal transformation across ferroelastic domain walls is clearly demonstrated by the quantitative 3w signals related to thermal conductivity. Different polarization oriented ferroelastic domains are found to exhibit different local thermal responses. The underlying mechanism is possibly associated with the inhomogeneous stress distribution across the ferroelastic domain wails, leading to different phonons scattering contributions in the BiFeO3 thin film.

分 类 号：TE357.44[石油与天然气工程—油气田开发工程] TN304.9[电子电信—物理电子学]