Oxygen diffusion in c-textured epitaxial YBa2Cu3O7-δ thin films
来源期刊：中国有色金属学报(英文版)2001年第4期
论文作者：李力 周健 袁润章 董学斌
文章页码：576 - 578
Key words：oxygen diffusion; in situ X-ray diffraction; relaxation time
Abstract: Isothermal oxygen in-diffusion in c-textured epitaxial YBa2Cu3O7-δ thin films was studied by in situ X-ray diffraction. Thermal expansion coefficients of c-axis length with different oxygen contents are αc (6.91, O2)=19.1×10-6K-1and αc(6.0, N2)=19.3×10-6 K-1 respectively. Chemical diffusion process of oxygen was described by relaxation time. From the Arrhenius plot of relaxation time, an activation energy of lattice diffusion was obtained as 1.1eV,which is close to the results of SIMS (0.95 eV) and internal friction (1.02 eV).
