Oxygen Diffusion in SrTiO₃ and Related Perovskite Oxides

Abstract

The transport of oxygen ions plays a central role in determining the performance or the degradation of perovskite‐type oxides in applications as diverse as ceramic capacitors, solid electrolytes, memristive devices and all‐oxide electronics. In this Feature Article, experimental data reported in the literature for oxygen diffusion in SrTiO3 and in related titanate, zirconate and cerate perovskite oxides [CaTiO3, BaTiO3, (Na,Bi)TiO3, Pb(Ti,Zr)O3, CaZrO3, SrZrO3, BaZrO3, SrCeO3, BaCeO3] are reviewed. The two related aims are to draw attention to discrepancies and to identify reliable diffusion data. The physical limit to the diffusivity of oxygen vacancies in a perovskite oxide is also considered.

Grain growth in weak electric fields in strontium titanate: Grain growth acceleration by defect redistribution

“…However, kinetics needs to be addressed [48,49]. The equilibrium defect profile with external electric field sketched in Fig.…”

The influence of non-stoichiometry on the switching kinetics of strontium-titanate ReRAM devices

“…At this point, it has to be mentioned that the DW hop values used in the fit exceed the ones measured for STO. 34 Simulations by Marchewka 35 suggest that this inconsistency may originate from the interrelation of drift and diffusion transport. For fitting the kinetics of the Ti-rich sample, the activation energy for the oxygen vacancy migration had to be lowered to 0.9 eV.…”

Conductivity and structure of sub-micrometric SrTiO3–YSZ composites

“…The symmetric Bruggeman model for inter-percolating phases in a composite was used to model the bulk conductivity [20]. The conductivity of the composite Ψm is -1 was used [24].…”