G. Tarrach et al., Nanometer spot allocation for Raman spectroscopy on ferroelectrics by polarization and piezoresponse force microscopy, APPL PHYS L, 79(19), 2001, pp. 3152-3154
We report the 100% correlation between polarized light microscopy (PLM), pi
ezoresponse force microscopy (PFM), and micro-Raman spectroscopy when inves
tigating domain-rich ferroelectric systems. In order to allocate the desire
d spot on a submicrometer scale, both PLM and PFM were combined to elucidat
e the effective three-dimensional ferroelectric domain distribution. With P
FM we observe spike-like a and c domains well inside extended a and c-polar
ized areas, which were not conclusive with PLM. The knowledge on such a dom
ain distribution is essential when addressing quantitative micro-Raman spec
troscopy. In addition, we show the unambiguous differentiation between a an
d c domains on the submicrometer scale using the B-2 mode of lattice vibrat
ions. (C) 2001 American Institute of Physics.