Time-dependent transient currents were studied at elevated temperatures (200–220C) in amorphous barium titanate thin film capacitors. Current transients display a peak whose time position varied with applied voltage and temperature. The response was analyzed through space charge limited current transient theories. Extracted drift mobilities were in the 10–11 to 10–12cm2/Vs range and showed an activation energy of 1eV. The phenomena were associated with O vacancy migration in BaTiO3.

Space Charge Limited Transient Currents and Oxygen Vacancy Mobility in Amorphous BaTiO3 Thin Films. F.El Kamel, P.Gonon, L.Ortega, F.Jomni, B.Yangui: Journal of Applied Physics, 2006, 99[9], 094107 (5pp)