Superconducting properties and microstructural evolution of Li doped Bi2Sr2CaCu2Ox

S. Wu; Justin Schwartz; G. W. Raban

doi:10.1016/0921-4534(95)00162-X

Superconducting properties and microstructural evolution of Li doped Bi₂Sr₂CaCu₂O_x

S. Wu, Justin Schwartz, G. W. Raban

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Abstract

Superconducting properties and microstructural evolution of Li doped Bi₂Sr₂CaCu₂O_x with nominal composition of Bi₂Sr₂Ca(Cu_1-yLi_y)₂O_x and Bi_2+zSr₂CaCu₂Li_yO_x were studied T_{c, zero} increased by 10 K from undoped Bi₂Sr₂CaCu₂O_x to 94.1 K, and T_{c, onset} > 100 K was observed. Li doped Bi₂Sr₂CaCu₂O_x systems exhibit a similar phase formation sequence as undoped Bi₂Sr₂CaCu₂O_x but at significantly lower temperatures. The liquid phase formed at lower temperatures in Li doped materials promotes the formation and growth of the 2212 phase. Four factors indicate that Li partially substituted for Cu in 2212 while it also resided interstitially and/or in non-superconducting phases: the existence of Cu free phases in Bi₂Sr₂Ca(Cu_1-yLi_y)₂O_x, the presence of CuO phases in Bi_2+zSr₂CaCu₂Li_yO_x, EDX measurements, and NMR results.

Original language	English (US)
Pages (from-to)	297-308
Number of pages	12
Journal	Physica C: Superconductivity and its applications
Volume	246
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(95)00162-X
State	Published - May 10 1995

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(95)00162-X

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title = "Superconducting properties and microstructural evolution of Li doped Bi2Sr2CaCu2Ox",

abstract = "Superconducting properties and microstructural evolution of Li doped Bi2Sr2CaCu2Ox with nominal composition of Bi2Sr2Ca(Cu1-yLiy)2Ox and Bi2+zSr2CaCu2LiyOx were studied Tc, zero increased by 10 K from undoped Bi2Sr2CaCu2Ox to 94.1 K, and Tc, onset > 100 K was observed. Li doped Bi2Sr2CaCu2Ox systems exhibit a similar phase formation sequence as undoped Bi2Sr2CaCu2Ox but at significantly lower temperatures. The liquid phase formed at lower temperatures in Li doped materials promotes the formation and growth of the 2212 phase. Four factors indicate that Li partially substituted for Cu in 2212 while it also resided interstitially and/or in non-superconducting phases: the existence of Cu free phases in Bi2Sr2Ca(Cu1-yLiy)2Ox, the presence of CuO phases in Bi2+zSr2CaCu2LiyOx, EDX measurements, and NMR results.",

author = "S. Wu and Justin Schwartz and Raban, {G. W.}",

year = "1995",

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doi = "10.1016/0921-4534(95)00162-X",

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pages = "297--308",

journal = "Physica C: Superconductivity and its applications",

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T1 - Superconducting properties and microstructural evolution of Li doped Bi2Sr2CaCu2Ox

AU - Wu, S.

AU - Schwartz, Justin

AU - Raban, G. W.

PY - 1995/5/10

Y1 - 1995/5/10

N2 - Superconducting properties and microstructural evolution of Li doped Bi2Sr2CaCu2Ox with nominal composition of Bi2Sr2Ca(Cu1-yLiy)2Ox and Bi2+zSr2CaCu2LiyOx were studied Tc, zero increased by 10 K from undoped Bi2Sr2CaCu2Ox to 94.1 K, and Tc, onset > 100 K was observed. Li doped Bi2Sr2CaCu2Ox systems exhibit a similar phase formation sequence as undoped Bi2Sr2CaCu2Ox but at significantly lower temperatures. The liquid phase formed at lower temperatures in Li doped materials promotes the formation and growth of the 2212 phase. Four factors indicate that Li partially substituted for Cu in 2212 while it also resided interstitially and/or in non-superconducting phases: the existence of Cu free phases in Bi2Sr2Ca(Cu1-yLiy)2Ox, the presence of CuO phases in Bi2+zSr2CaCu2LiyOx, EDX measurements, and NMR results.

AB - Superconducting properties and microstructural evolution of Li doped Bi2Sr2CaCu2Ox with nominal composition of Bi2Sr2Ca(Cu1-yLiy)2Ox and Bi2+zSr2CaCu2LiyOx were studied Tc, zero increased by 10 K from undoped Bi2Sr2CaCu2Ox to 94.1 K, and Tc, onset > 100 K was observed. Li doped Bi2Sr2CaCu2Ox systems exhibit a similar phase formation sequence as undoped Bi2Sr2CaCu2Ox but at significantly lower temperatures. The liquid phase formed at lower temperatures in Li doped materials promotes the formation and growth of the 2212 phase. Four factors indicate that Li partially substituted for Cu in 2212 while it also resided interstitially and/or in non-superconducting phases: the existence of Cu free phases in Bi2Sr2Ca(Cu1-yLiy)2Ox, the presence of CuO phases in Bi2+zSr2CaCu2LiyOx, EDX measurements, and NMR results.

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Superconducting properties and microstructural evolution of Li doped Bi₂Sr₂CaCu₂O_x

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