The Influence of Metallic Interfaces on the Properties of Bulk (Hg,A)Ba2Ca2Cu3Ox (A=Pb,Bi) Superconductors
Synthesis and processing parameters for (Hg,A)Ba2Ca2Cu3.1Oy (A=Bi, Pb) were optimized for growth on AgPd and Au substrates (<850° C). Use of Bi2CuO4 as a Bi source combined with variations of BaCaCuO precursor phase assemblages allowed the formation of some liquid phase during the reaction and resulted in dense (Hg,A)Ba2Ca2Cu3.1Oy samples with aligned colonies of grains. Magnetization measurements in fields up to 30 T indicated good intergrain coupling within the large grain colonies. Phase pure samples of (Hg,A)1223 have been synthesized on AgPd and Au foils. Both the AgPd and Au interfaces were found to enhance grain growth and alignment.
KeywordsNational High Magnetic Field Laboratory Alumina Sheath Phase Pure Sample Intergrain Connectivity Alkaline Earth Cuprates
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