Hysteresis in AC magnetic susceptibility and onset of field penetration in bulk granular YBa2Cu3Oy superconductors

C. Y. Lee; L. W. Song; Y. H. Kao

doi:10.1016/0921-4534(92)90940-E

Hysteresis in AC magnetic susceptibility and onset of field penetration in bulk granular YBa₂Cu₃O_y superconductors

C. Y. Lee
, L. W. Song
, Y. H. Kao

Physics

SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Hysteresis in AC magnetic susceptibility of bulk granular YBa₂Cu₃O_y superconductors was investigated as a function of DC magnetic field and temperature. The pronounced irreversible behavior in the low field field regime allows a new approach to determine the onset of magnetic field penetration and an averaged lower critical field of the superconducting grains. A complete field-screening state in the intergranular region was observed for the first time. The temperature dependence of the lower critical field in both intra- and intergranular regions is consistent with the BCS pairing mechanism with a modified gap parameter 2Δ(0) = 7.0 kT_c.

Original language	English
Pages (from-to)	429-433
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	191
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(92)90940-E
State	Published - Feb 15 1992

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abstract = "Hysteresis in AC magnetic susceptibility of bulk granular YBa2Cu3Oy superconductors was investigated as a function of DC magnetic field and temperature. The pronounced irreversible behavior in the low field field regime allows a new approach to determine the onset of magnetic field penetration and an averaged lower critical field of the superconducting grains. A complete field-screening state in the intergranular region was observed for the first time. The temperature dependence of the lower critical field in both intra- and intergranular regions is consistent with the BCS pairing mechanism with a modified gap parameter 2Δ(0) = 7.0 kTc.",

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T1 - Hysteresis in AC magnetic susceptibility and onset of field penetration in bulk granular YBa2Cu3Oy superconductors

AU - Lee, C. Y.

AU - Song, L. W.

AU - Kao, Y. H.

PY - 1992/2/15

Y1 - 1992/2/15

N2 - Hysteresis in AC magnetic susceptibility of bulk granular YBa2Cu3Oy superconductors was investigated as a function of DC magnetic field and temperature. The pronounced irreversible behavior in the low field field regime allows a new approach to determine the onset of magnetic field penetration and an averaged lower critical field of the superconducting grains. A complete field-screening state in the intergranular region was observed for the first time. The temperature dependence of the lower critical field in both intra- and intergranular regions is consistent with the BCS pairing mechanism with a modified gap parameter 2Δ(0) = 7.0 kTc.

AB - Hysteresis in AC magnetic susceptibility of bulk granular YBa2Cu3Oy superconductors was investigated as a function of DC magnetic field and temperature. The pronounced irreversible behavior in the low field field regime allows a new approach to determine the onset of magnetic field penetration and an averaged lower critical field of the superconducting grains. A complete field-screening state in the intergranular region was observed for the first time. The temperature dependence of the lower critical field in both intra- and intergranular regions is consistent with the BCS pairing mechanism with a modified gap parameter 2Δ(0) = 7.0 kTc.

UR - https://www.scopus.com/pages/publications/0026819479

U2 - 10.1016/0921-4534(92)90940-E

DO - 10.1016/0921-4534(92)90940-E

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AN - SCOPUS:0026819479

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 3-4

ER -

Hysteresis in AC magnetic susceptibility and onset of field penetration in bulk granular YBa₂Cu₃O_y superconductors

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