Optical absorption and light-induced charge transport of Fe↑(2+) in BaTiO↓(3)

摘要

Iron doped barium titanate was grown and reduced at various temperatures. Using optical absorption and electron paramagnetic resonance (photo-EPR) simultaneously, a wide absorption band at ～2.1 eV due to Fe↑(2+) is established. The light-induced charge transport between Fe↑(2+/3+) and shallow Ti↑(4+/3+) -Vo s identified, showing a two-center type response at low and one-center type response at room temperature. # 1997 American Institute of Physics. S0003-6951 (97)03518-3