AC Complex Susceptibility of Superconducting La–Sr–Cu–O and Y–Ba–Cu–O Systems

The complex susceptibility x'-ix” of the superconducting La–Sr–Cu–O and Y–Ba–Cu–O systems were measured together with their electrical resistance. The recent best specimen of Y 1 Ba 2 Cu 3 O 7-α shows the complete Meissner effect in the temperature width less than 1.7 K at T c =91 K (mid-point)...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1987-01, Vol.26 (S3-2), p.1023
Main Authors: Oda, Yasukage, Nakada, Ichiroh, Kohara, Takao, Fujita, Hiroshi, Kaneko, Tetuyuki, Toyoda, Haruhisa, Sakagami, Eiji, Asayama, Kunisuke
Format: Article
Language:English
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Summary:The complex susceptibility x'-ix” of the superconducting La–Sr–Cu–O and Y–Ba–Cu–O systems were measured together with their electrical resistance. The recent best specimen of Y 1 Ba 2 Cu 3 O 7-α shows the complete Meissner effect in the temperature width less than 1.7 K at T c =91 K (mid-point). This specimen was found to be distorted to the orthorhombic structure by about 1.5%. This specimen was studied both in powdered and in recompressed into a pellet style. It is found that the semiconductive behavior in the electrical resistance comes from the grain boundary. DC susceptibility and ESR measurements of this specimen were carried out.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAPS.26S3.1023