Nonlinear positive temperature coefficient of resistance (PCTR) of BaTiO3 films was studied. Conductance decreasing with increasing temperature (T) above a (T) characteristic was found in the reverse-diode characteristics of metal contacts on strained BaTiO3 epitaxial films. It was suggested that comparing the PCTR effect in ceramics, the anomaly was regarded as a PTCR effect at metal/ferroelectric contact and the origin of the effect in the thin films and single crystals were also discussed.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)