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- E-ISSN 2288-8985
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Relationship between Carrier Concentration and Superconducting Transition Temperature in Bi-Sr-Ca-Cu-O Superconductor
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1992, v.5 no.2, pp.223-228
Kim,
M. C., &
Park,
S.
J.
(1992). Relationship between Carrier Concentration and Superconducting Transition Temperature in Bi-Sr-Ca-Cu-O Superconductor. Analytical Science and Technology, 5(2), 223-228.
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Abstract
<TEX>$Bi_2Sr_2Ca_2Cu_3Oy$</TEX>-based superconductor phases were synthesized by the wet process using acetate precursors. Superconducting transition temperature (<TEX>$T_c$</TEX>) was determined from both measurements of electrical resistivity and magnetic susceptibility for the samples which were sintered at the temperatures of <TEX>$850^{\circ}C$</TEX>, <TEX>$860^{\circ}C$</TEX>, and <TEX>$870^{\circ}C$</TEX> for 40 hours, respectively. The values of carrier concentration from Hall measurements were compared with <TEX>$T_c$</TEX> data as a function of the sintering temperature. The formation mechanism of the superconducting phase was tentatively discussed on a basis of the distribution profile concept of the carrier concentration and the amount of superconducting phases in a ceramic bulk. This explanation may be supported by the experimental results of correlation between the relative amount of superconducting phases and the difference of <TEX>$T_c$</TEX> values between superconducting onset temperature and cutoff temperature at each sintering temperature.
- keywords
- Bi-Sr-Ca-Cu-O Superconductor, Superconducting transition, formation mechamism
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