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Flux-pinning behavior and the interlayer coupling of the Hg0.7Cr0.3Sr2CuO4+delta superconductor

Title
Flux-pinning behavior and the interlayer coupling of the Hg0.7Cr0.3Sr2CuO4+delta superconductor
Authors
Choi, JHKim, MSLee, SILee, SYYang, ISYakhmi, JVMandal, JBBandyopadhyay, BGhosh, B
Ewha Authors
양인상
SCOPUS Author ID
양인상scopus
Issue Date
1998
Journal Title
PHYSICAL REVIEW B
ISSN
1098-0121JCR Link1550-235XJCR Link
Citation
vol. 58, no. 1, pp. 538 - 543
Publisher
AMER PHYSICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
previously the compound of Hg0.7Cr0.3Sr2CuO4+delta was believed to exhibit an enhanced flux-pinning behavior compared to the pristine HgBa2CuO4+delta. As candidates for its origin, possible extended defects of a superlattice in the c direction or a strong coupling deduced from a reduced distance between CuO2 planes have been proposed. To clarify these, we extensively measured the magnetization of the c-axis aligned grains of this compound. Contrary to previous belief, the irreversibility line and magnetic hysteresis show reduced pinning properties. From the analysis of the reversible magnetizations based on the vortex fluctuation model, the high-field scaling analysis, and the Hao-Clem model, the interlayer coupling was also confirmed to be weak. The proposed extended defects seem not to be effective in pinning vortices in Hg0.7Cr0.3Sr2CuO4+delta. [S0163-1829(98)04922-4].
DOI
10.1103/PhysRevB.58.538
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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