In this article we present d.c. resistivity, a.c. impedance, magnetization
and dielectric permittivity measurements in PT0.67Ca0.33MnO3 A rise in the
imaginary part of impedance was detected at the charge ordering transition
temperature (T = 225 K). This indicates an intrinsic capacitive behavior of
the sample in the charge ordering state. The a.c. impedance is presented h
ere as a valid and easy tool to characterize the charge ordering transition
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