V'yunov, O.I.; Kovalenko, L.L.; Belous, A.G.
(Condensed Matter Physics, 2003)
Electrophysical properties and microstructure of PTCR ceramics of the system
(Ba,Ca,Sr,Y)TiO3 + y%Mn have been investigated. It has been shown
that manganese ions increase the potential barrier at grain boundaries and
form ...