Ferroelectricity and ferrimagnetism in iron-doped BaTiO3

The structural and physical properties of pseudocubic thin-film BaTi1-xFexO 3(0.5 less than or equal tox less than or equal to0.75) grown by pulsed-las er deposition are reported. This material is of interest because the corres ponding bulk compounds have hexagonal structure for comparable x, and becau se the films are both ferroelectric and ferrimagnetic well above room tempe rature. A substantial increase of the ferroelectric transition temperature relative to that of bulk BaTiO3 is attributed to lattice expansion induced by Fe doping. (C) 2001 American Institute of Physics.