Interdiffusion of rare-earth cations in Ln1−x ′Ln x ″ Ba2Cu3O7 − δ (Ln′, Ln″ = Y, Dy, Ho) High-T c superconductors

Abstract

O 7 -δ systems have been determined in air at a temperature of 1233 K by the Boltzmann-Matano method from the yttrium/hol mium, yttrium/dysprosium, and dysprosium/holmium concentration profiles across the diffusion zone between two pellets of the high T c superconductors. The composition dependences of the interdiffusion coef ficients in the solid solution systems are presented.