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Grain Boundary Segregation and Thermal History Effects on Properties of La1.85Sr0.15CuO4-y Superconductors

  • Yet-Ming Chiang (a1), Alexana Roshko (a1), Brian D. Fabes (a1), Dominic K. Leung (a1), Jeri Ann S. Ikeda (a1), David A. Rudman (a1), Michael J. Parker (a1) and John R. Martin (a1)...

Abstract

The grain boundary segregation of Sr in the La1.85Sr0.15CuO4-y system, and its effects on polycrystalline diamagnetic properties, have been characterized. Equilibration at 1000°C reduces grain boundary segregation compared to that which is present at 700°C. Results indicate that critical currents in randomly oriented polycrystalline materials will be improved if annealing treatments can be optimized to minimize grain boundary segregation without degrading lattice oxygen stoichiometry.

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Grain Boundary Segregation and Thermal History Effects on Properties of La1.85Sr0.15CuO4-y Superconductors

  • Yet-Ming Chiang (a1), Alexana Roshko (a1), Brian D. Fabes (a1), Dominic K. Leung (a1), Jeri Ann S. Ikeda (a1), David A. Rudman (a1), Michael J. Parker (a1) and John R. Martin (a1)...

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