Superconducting and Structural Properties of the (Ba 0 . 6 K 0.4 ) (Bi 1-Y Sb Y )O3 System

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SUPERCONDUCTING AND STRUCTURAL PROPERTIES OF THE (Ba 0 . 6 K0 . 4 ) (Bil_ySby)O 3 SYSTEM* B. DABROWSKI, S. PEI, D.R. RICHARDS, Y. ZHENG, J.D. JORGENSEN, D.G. HINKS, C.D. KIMBALL# AND A.W. MITCHELL, Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 #Northern Illinois University, DeKalb, IL 60115 ABSTRACT Single-phase samples of (Bal_xKx) (BilySby)O3 have been synthesized over a limited compositional range using a two-step procedure: high-temperature firing in a low oxygen partial pressure followed by low-temperature oxygen annealing. For y=0 and 0.370.35) or in a 8% 0 2 /N 2 gas mixture at 780 0 C (for x

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