[HTML][HTML] Mapping grain boundary heterogeneity at the nanoscale in a positive temperature coefficient of resistivity ceramic
Despite being of wide commercial use in devices, the orders of magnitude increase in
resistance that can be seen in some semiconducting BaTiO 3-based ceramics, on heating
through the Curie temperature (TC), is far from well understood. Current understanding of
the behavior hinges on the role of grain boundary resistance that can be modified by
polarization discontinuities which develop in the ferroelectric state. However, direct
nanoscale resistance mapping to verify this model has rarely been attempted, and the …
resistance that can be seen in some semiconducting BaTiO 3-based ceramics, on heating
through the Curie temperature (TC), is far from well understood. Current understanding of
the behavior hinges on the role of grain boundary resistance that can be modified by
polarization discontinuities which develop in the ferroelectric state. However, direct
nanoscale resistance mapping to verify this model has rarely been attempted, and the …