Local Piezoresponse and Thermal Behavior of Ferroelastic Domains in Multiferroic BiFeO3 Thin Films by Scanning Piezo-Thermal Microscopy
YU Hui-Zhu1,2 , CHEN Hong-Guang3 , XU Kun-Qi1,2 , ZHAO Kun-Yu1 , ZENG Hua-Rong1** , LI Guo-Rong1
1 Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 2000502 University of Chinese Academy of Sciences, Beijing 1000393 Shanghai Nanotechnology Promotion Center, Shanghai 200237
Abstract ：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 inhomogeneous piezoelectric responses are found in the thin film. A remarkably local thermal transformation across ferroelastic domain walls is clearly demonstrated by the quantitative 3Ω 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 walls, leading to different phonons scattering contributions in the BiFeO3 thin film.
出版日期: 2014-10-31
:
77.55.Nv
(Multiferroic/magnetoelectric films)
77.80.Dj
(Domain structure; hysteresis)
65.40.-b
(Thermal properties of crystalline solids)
68.37.Ps
(Atomic force microscopy (AFM))
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2014, Vol. 31 
