TITLE

Temperature dependence of polarization and charge dynamics on the BaTiO[sub 3](100) surface by scanning probe microscopy

AUTHOR(S)
Kalinin, Sergei V.; Bonnell, Dawn A.
PUB. DATE
February 2001
SOURCE
Applied Physics Letters;2/19/2001, Vol. 78 Issue 8, p1116
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Variable-temperature atomic force microscopy, piezoresponse force microscopy (PFM), and scanning surface potential microscopy were combined to determine the temperature response of polarization and screening charge on BaTiO[sub 3](100) surfaces. The ferroelectric-domain induced surface corrugations and piezoelectric response decrease with temperature and disappear at the Curie temperature. The temperature dependence of the PFM contrast is explained within the framework of the Ginzburg-Devonshire theory with the effect of a dielectric tip-surface gap taken into account. The temperature dependence of the surface potential contrast is ascribed to the interplay between the release of the screening charges with temperature and their slow relaxation. The results indicate that surface potential polarity is reversed relative to that expected from polarization orientation on BaTiO[sub 3] in ambient. © 2001 American Institute of Physics.
ACCESSION #
4710834

 

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