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Title: Evolution of Superconducting Properties of Coexistent Bi-2212 and Bi-2223 phases in BSCCO
Authors: Gayathri, V
Sathyanarayana, A T
Amaladass, E P
Vinod, K
Kumary, T Geetha
Pandian, R
Mani, Awadhesh
Keywords: BSCCO;High temperature superconductivity;Proximity effect;Critical current density
Issue Date: May-2021
Publisher: NISCAIR-CSIR, India
Abstract: The evolution of superconducting properties of BSCCO superconductors, inadvertently hosting the two superconducting phases Bi-2212 and Bi-2223 have been investigated in pristine and Pb doped BSCCO. The superconducting transition temperature TC of Bi-2212 phase monotonically increases with increasing Bi-2223 phase fraction. On the other hand Bi-2223 phase exhibits depression in TC for its lower phase fractions (<24%) but attains its bulk value as Bi-2223 phase fraction is increased to 30%. This behavior has been rationalized by invoking the interplay of proximity effects between the two coexisting phases and establishment of Bi-2223 superconducting percolation path. In addition to aiding the formation of BSCCO with higher Bi-2223 phase fraction, the Pb substitution also leads to an enhancement of critical current density by the creation of pinning centres.
Page(s): 391-397
ISSN: 0975-0959 (Online); 0301-1208 (Print)
Appears in Collections:IJPAP Vol.59(05) [May 2021]

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