New and Non-Cuprate SuperconductorsNo Access

STUDY OF THE MIXTURES OF MGB₂ AND HIGH T_C SUPERCONDUCTORS

Materials Physics Laboratory, State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China

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J. REN

Materials Physics Laboratory, State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China

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S. H. HAN

School of Physics and Electronics, Shandong University, Jinan 250010, China

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, and

H. ZHANG

Materials Physics Laboratory, State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China

Corresponding author.

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https://doi.org/10.1142/S0217979207044548Cited by:7 (Source: Crossref)

Abstract

To get some information about the interaction of two totally different kinds of superconductors in a mixture, we prepared the samples of mixture of two kinds of superconductors (YBa₂Cu₃O₇₊MgB₂), using normal annealing method at low temperature (400 °C ~ 600 °C). The variations of the transition temperature (T_c) and critical current (J_c) of the mixtures are investigated. We also prepared a series of samples of MgB₂ with small ratios of YBCO or Bi-2223 as addition. Carefully comparison shows that the J_c drops when the ratio of YBCO additions increases, but in the Bi-2223 additions the trend goes just the opposite.