AC susceptibility and microstructure of alkali doped polycrystalline YBCO HTSC materials

A. Veneva; D. K. Petrov; P. Dittrich; M. J. Naughton

doi:10.1016/S0921-4534(96)00560-6

AC susceptibility and microstructure of alkali doped polycrystalline YBCO HTSC materials

A. Veneva, D. K. Petrov, P. Dittrich, M. J. Naughton

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

6 Citations (Scopus)

Abstract

In this work we report experimental results concerning the influence of potassium and excess copper additions on the AC complex susceptibility and microstructural development within polycrystalline YBCO high-temperature superconductors with nominal composition Y_1-0.2xBa_2-0.2xK_xCu₃O_y (x = 0-1.20). The real (X′) and the imaginary (X″) parts of the complex magnetic susceptibility of YBCO were recorded as a function of the temperature at various magnetic fields up to 10 Oe. From these data the intergranular critical current densities were calculated using Bean's critical state model. A proper concentration x, which is approximately equal to x = 0.40 in the initial Y1-_0.2xBa_2-0.2xK_xCu₃O_y batch was found to improve the Josephson coupling between the grains.

Original language	English
Pages (from-to)	230-234
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	271
Issue number	3-4
DOIs	https://doi.org/10.1016/S0921-4534(96)00560-6
Publication status	Published - 1996 Nov 10
Externally published	Yes

Keywords

AC susceptibility of superconductors
Critical current density
Grain boundaries
Microstructure
Substitution effects
Weak links

ASJC Scopus subject areas

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

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10.1016/S0921-4534(96)00560-6

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title = "AC susceptibility and microstructure of alkali doped polycrystalline YBCO HTSC materials",

abstract = "In this work we report experimental results concerning the influence of potassium and excess copper additions on the AC complex susceptibility and microstructural development within polycrystalline YBCO high-temperature superconductors with nominal composition Y1-0.2xBa2-0.2xKxCu3Oy (x = 0-1.20). The real (X′) and the imaginary (X″) parts of the complex magnetic susceptibility of YBCO were recorded as a function of the temperature at various magnetic fields up to 10 Oe. From these data the intergranular critical current densities were calculated using Bean's critical state model. A proper concentration x, which is approximately equal to x = 0.40 in the initial Y1-0.2xBa2-0.2xKxCu3Oy batch was found to improve the Josephson coupling between the grains.",

keywords = "AC susceptibility of superconductors, Critical current density, Grain boundaries, Microstructure, Substitution effects, Weak links",

author = "A. Veneva and Petrov, {D. K.} and P. Dittrich and Naughton, {M. J.}",

note = "Funding Information: This work is supported in part by the New York State Institute on Superconductivity under a grant by the New York State Research and Development Agency.",

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AU - Veneva, A.

AU - Petrov, D. K.

AU - Dittrich, P.

AU - Naughton, M. J.

N1 - Funding Information: This work is supported in part by the New York State Institute on Superconductivity under a grant by the New York State Research and Development Agency.

PY - 1996/11/10

Y1 - 1996/11/10

N2 - In this work we report experimental results concerning the influence of potassium and excess copper additions on the AC complex susceptibility and microstructural development within polycrystalline YBCO high-temperature superconductors with nominal composition Y1-0.2xBa2-0.2xKxCu3Oy (x = 0-1.20). The real (X′) and the imaginary (X″) parts of the complex magnetic susceptibility of YBCO were recorded as a function of the temperature at various magnetic fields up to 10 Oe. From these data the intergranular critical current densities were calculated using Bean's critical state model. A proper concentration x, which is approximately equal to x = 0.40 in the initial Y1-0.2xBa2-0.2xKxCu3Oy batch was found to improve the Josephson coupling between the grains.

AB - In this work we report experimental results concerning the influence of potassium and excess copper additions on the AC complex susceptibility and microstructural development within polycrystalline YBCO high-temperature superconductors with nominal composition Y1-0.2xBa2-0.2xKxCu3Oy (x = 0-1.20). The real (X′) and the imaginary (X″) parts of the complex magnetic susceptibility of YBCO were recorded as a function of the temperature at various magnetic fields up to 10 Oe. From these data the intergranular critical current densities were calculated using Bean's critical state model. A proper concentration x, which is approximately equal to x = 0.40 in the initial Y1-0.2xBa2-0.2xKxCu3Oy batch was found to improve the Josephson coupling between the grains.

KW - AC susceptibility of superconductors

KW - Critical current density

KW - Grain boundaries

KW - Microstructure

KW - Substitution effects

KW - Weak links

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JO - Physica C: Superconductivity and its Applications

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IS - 3-4

ER -

AC susceptibility and microstructure of alkali doped polycrystalline YBCO HTSC materials

Abstract

Keywords

ASJC Scopus subject areas

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