Positive temperature co-efficient of resistivity materials (PTCR) are a family of semiconductors that exhibit special properties concerning electrical conductivity. In particular, their electrical ...

Electrical resistivity is a basic property that quantifies a material’s opposition to current flow—it’s the reciprocal of conductivity. The resistivity of a material depends upon several factors, ...

Physicists have discovered surprising changes in electrical resistivity in iron-based superconductors. The findings offer further evidence that magnetism and superconductivity are closely related in ...