摘要
Isothermal oxygen in diffusion in c textured epitaxial YBa 2Cu 3O 7- δ thin films was studied by in situ X ray diffraction. Thermal expansion coefficients of c axis length with different oxygen contents are α c (6.91, O 2)=19.1×10 -6 K -1 and α c (6.0, N 2)=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 1.1?eV, which is close to the results of SIMS (0.95?eV) and internal friction (1.02?eV).
Isothermal oxygen in diffusion in c textured epitaxial YBa 2Cu 3O 7- δ thin films was studied by in situ X ray diffraction. Thermal expansion coefficients of c axis length with different oxygen contents are α c (6.91, O 2)=19.1×10 -6 K -1 and α c (6.0, N 2)=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 1.1?eV, which is close to the results of SIMS (0.95?eV) and internal friction (1.02?eV).
出处
《中国有色金属学会会刊：英文版》
CSCD
2001年第4期576-578,共3页
Transactions of Nonferrous Metals Society of China
基金
Project ( 99J0 70 )supportedbyHubeiProvicialNaturalScienceFoundation
