Electrical Conduction of Rare‐Earth‐Doped BaTiO ₃ Single Crystals

Abstract

The effect of 0.2 to 0.8 at.% rare‐earth ions on the conductivity of melt‐grown BaTiO 3 crystals was studied by optical absorption, luminescence, Hall coefficient, and electrical conductivity measurements. The conductivity is proportional to the dopant concentration in these crystals; such is not the case in BaTiO 3 ceramics. A rare‐earth ion substitutes on the Ba 2+ site and yields a donor.