Strain Effects on Point Defects and Chain-Oxygen Order-Disorder Transition in 123-Structure Cuprate Superconductors

H. B. Su, D. O. Welch, Winnie Wong-Ng

The energetics of Schottky defects in 123 cuprate superconductor series, $\mathrm{REB}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_7$ (where RE = lanthandies) and $\mathrm{YA}{\mathrm{E}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_7$ (AE = alkali-earths), were found to hav…