Effects of deformation on current-limiting factors in Ag/BiSCCO tapes

V. Beilin; A. Goldgirsh; E. Yashchin; M. Roth; M. Schieber

doi:10.1016/S0921-4534(98)00596-6

Effects of deformation on current-limiting factors in Ag/BiSCCO tapes

V. Beilin^*
, A. Goldgirsh
, E. Yashchin
, M. Roth
, M. Schieber

^*Corresponding author for this work

The Institute of Applied Physics

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

5 Scopus citations

Abstract

I-V characteristics, transport critical current density J_c at 77 K in moderate magnetic fields and irreversibility fields were measured in Ag/BiSCCO-2223 tapes at various stages of the OPIT process. Intermediate deformation dramatically reduces I_c in as-deformed state while retaining a finite-size percolative channel for transport current after used pressing load up to 11 GPa. The channel has a similar fraction of strong links (45%) and vortex pinning characteristics as those in a non-deformed state. Combination of intermediate deformation with subsequent sintering improves pinning characteristics of the tapes, reasonably increases vortex-glass - vortex-liquid crossover field H_g and significantly accelerates I_c growth during subsequent thermal processing.

Original language	English
Pages (from-to)	56-64
Number of pages	9
Journal	Physica C: Superconductivity and its Applications
Volume	309
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4534(98)00596-6
State	Published - 1 Dec 1998

Keywords

Bi-2223 tapes
Flux pinning
Intermediate deformation
Weak links

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10.1016/S0921-4534(98)00596-6

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title = "Effects of deformation on current-limiting factors in Ag/BiSCCO tapes",

abstract = "I-V characteristics, transport critical current density Jc at 77 K in moderate magnetic fields and irreversibility fields were measured in Ag/BiSCCO-2223 tapes at various stages of the OPIT process. Intermediate deformation dramatically reduces Ic in as-deformed state while retaining a finite-size percolative channel for transport current after used pressing load up to 11 GPa. The channel has a similar fraction of strong links (45\%) and vortex pinning characteristics as those in a non-deformed state. Combination of intermediate deformation with subsequent sintering improves pinning characteristics of the tapes, reasonably increases vortex-glass - vortex-liquid crossover field Hg and significantly accelerates Ic growth during subsequent thermal processing.",

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T1 - Effects of deformation on current-limiting factors in Ag/BiSCCO tapes

AU - Beilin, V.

AU - Goldgirsh, A.

AU - Yashchin, E.

AU - Roth, M.

AU - Schieber, M.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - I-V characteristics, transport critical current density Jc at 77 K in moderate magnetic fields and irreversibility fields were measured in Ag/BiSCCO-2223 tapes at various stages of the OPIT process. Intermediate deformation dramatically reduces Ic in as-deformed state while retaining a finite-size percolative channel for transport current after used pressing load up to 11 GPa. The channel has a similar fraction of strong links (45%) and vortex pinning characteristics as those in a non-deformed state. Combination of intermediate deformation with subsequent sintering improves pinning characteristics of the tapes, reasonably increases vortex-glass - vortex-liquid crossover field Hg and significantly accelerates Ic growth during subsequent thermal processing.

AB - I-V characteristics, transport critical current density Jc at 77 K in moderate magnetic fields and irreversibility fields were measured in Ag/BiSCCO-2223 tapes at various stages of the OPIT process. Intermediate deformation dramatically reduces Ic in as-deformed state while retaining a finite-size percolative channel for transport current after used pressing load up to 11 GPa. The channel has a similar fraction of strong links (45%) and vortex pinning characteristics as those in a non-deformed state. Combination of intermediate deformation with subsequent sintering improves pinning characteristics of the tapes, reasonably increases vortex-glass - vortex-liquid crossover field Hg and significantly accelerates Ic growth during subsequent thermal processing.

KW - Bi-2223 tapes

KW - Flux pinning

KW - Intermediate deformation

KW - Weak links

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IS - 1-2

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Effects of deformation on current-limiting factors in Ag/BiSCCO tapes

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Keywords

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