Ferroelectricity and ferrimagnetism in iron-doped BaTiO3

Abstract

The structural and physical properties of pseudocubic thin-film BaTi1−xFexO3(0.5⩽x⩽0.75) grown by pulsed-laser deposition are reported. This material is of interest because the corresponding bulk compounds have hexagonal structure for comparable x, and because the films are both ferroelectric and ferrimagnetic well above room temperature. A substantial increase of the ferroelectric transition temperature relative to that of bulk BaTiO3 is attributed to lattice expansion induced by Fe doping.