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Humidity effect on BaTiO3 c-domain surface potential inversion induced by electric field

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3 Author(s)
He, D.Y. ; Corrosion and Protection Center, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, People’s Republic of China ; Qiao, L.J. ; Volinsky, Alex A.

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The potential distribution of ferroelectric domains on a (001) BaTiO3 single crystal surface was investigated via scanning Kelvin probe microscopy at room temperature, with and without an electric field applied parallel to the (001) surface. A reversal of the c domain charge was observed after reaching a critical electric field intensity of 6 V/mm, which was much lower than the 200 V/mm coercive field. An immediate recovery was observed upon switching off the electric field. The humidity has a significant effect on the intensity of the inversion electric field. Surface adsorbates significantly affected the ferroelectric surface potential behavior. Due to a low 4 kJ/mol desorption energy, the electric field successfully removed surface adsorbates, allowing for the surface potential to reflect the actual domain polarization state.

Published in:

Journal of Applied Physics  (Volume:110 ,  Issue: 7 )

Date of Publication:

Oct 2011

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