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HIGH-PRESSURE SYNTHESIS AND SUPERCONDUCTIVITY OF NEW BULK Pr1-xCaxBa2Cu3O7-δSUPERCONDUCTORS

XIONG YU-FENG JIN DUO YAO YU-SHU WU FEI JIA SHUN-LIAN ZHAO ZHONG-XIAN

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HIGH-PRESSURE SYNTHESIS AND SUPERCONDUCTIVITY OF NEW BULK Pr1-xCaxBa2Cu3O7-δSUPERCONDUCTORS

XIONG YU-FENG, JIN DUO, YAO YU-SHU, WU FEI, JIA SHUN-LIAN, ZHAO ZHONG-XIAN
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  • The new bulk superconductors of Pr1-xCaxBa2Cu3O1-δ (0.4≤x≤0.6) have been synthesized under high pressure for the first time to our knowledge. The highest Tc of 98K was observed for Oxygen-deficient tetragonal Pr0.5Ca0.5Ba2Cu3O7-δ sample. Our results demonstrate the valence state of Pr in 123 structure is a mixed sate greater than 3+, hole filling and hybridization are the primary cause of the suppression of superconductivity by Pr in 123 structure.
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  • Received Date:  25 December 1997
  • Published Online:  05 May 1998

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