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A. C. Susceptibility of the Superconducting Bi-(Pb)-Sr-Ca-Cu-O System

1989; Institute of Physics; Volume: 28; Issue: 3A Linguagem: Inglês

10.1143/jjap.28.l373

1347-4065

Akihiko Sumiyama, Hozumi Endo, Jun Tsuchiya, Naoto Kijima, Masaaki Mizuno, Yasuo Oguri,

Rare-earth and actinide compounds

The ac magnetic susceptibility of the Bi-(Pb)-Sr-Ca-Cu-O system in which the high- T c phase ( T c >100 K) is the chief constituent has been measured. The diamagnetism attributed to the Josephson-like weak coupling is sensitive to the synthetic conditions and the grain contact structure. The magnetic susceptibility of BiSrCa 3 Cu 4 O x sintered for different periods has revealed that the Josephson-like coupling property is degraded as the volume fractions of the low- T c phase ( T c ∼75 K) and the insulating phases are decreased and the high- T c phase is formed.