Structural and microstructural transformations in Bi2Sr2Ca1 ?xYxCu2O8 + y system |
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Authors: | Chengyu Song Shulin Wen Guangcan Che |
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Institution: | (1) Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050 Shanghai, China;(2) State Key Laboratory of Superconductivity, Institute of Physics, Chinese Academy of Sciences, 100080 Beijing, China |
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Abstract: | Conclusions With the substitution of Y for Ca in BSCYCO system, both the hole concentration and structure parameters change. The superconductor-nonsuperconductor
transition at xc = 0.4 is more sensitive to the structure transformation than the variation in the hole concentration.
Microanalysis reveals an inhomogeneous substitution of Y for Ca. So a much sharper drop of T, is expected at transition point
by ideal monophase samples of BSCYCO.
A ratio of lattice constants c / o. 5 (a + b) is found to be a very good parameter of describing the SC-AF transition of ISCYCO,
reflecting the degree of the localization of Cu-3d electrons on the CuOz plane. |
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Keywords: | Bi2Sr2Ca1 -x YxCu2Oy substitution structural transformation |
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