Intergranular pinning potential and transport current path in BiPbSrCaCuO polycrystal superconductor

N. Murayama; Y. Kodama; S. Sakaguchi; F. Wakai; K. Michishita; Y. Ikuhara

doi:10.1016/0921-4534(91)91231-R

Intergranular pinning potential and transport current path in BiPbSrCaCuO polycrystal superconductor

N. Murayama, Y. Kodama, S. Sakaguchi, F. Wakai, K. Michishita, Y. Ikuhara

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

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Abstract

The magnetic field dependence of transport critical current density (Jct(H)) was measured at 77 K for Bi1.84Pb0.34Sr2.03Ca1.9Cu3.06Oy granular superconductors with Jct(0) of 3814 and 7170 A/cm². From the initial magnetization curve, the lower critical field (Hcl) of the grain was evaluated to be about 100 Oe in all samples. Intergranular pinning potential (U0gb) was evaluated from the time decay of remanent magnetization after a magnetic field of 50 Oe, which was lower than the Hcl, was applied at 77 K. The values of U0gb were 0.8 and 1.6 eV for the two samples, respectively. The Jct(0) was almost proportional to the U0gb.

Original language	English
Pages (from-to)	2213-2214
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	185-189
Issue number	PART 4
DOIs	https://doi.org/10.1016/0921-4534(91)91231-R
Publication status	Published - 1991 Dec 1

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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abstract = "The magnetic field dependence of transport critical current density (Jct(H)) was measured at 77 K for Bi1.84Pb0.34Sr2.03Ca1.9Cu3.06Oy granular superconductors with Jct(0) of 3814 and 7170 A/cm2. From the initial magnetization curve, the lower critical field (Hcl) of the grain was evaluated to be about 100 Oe in all samples. Intergranular pinning potential (U0gb) was evaluated from the time decay of remanent magnetization after a magnetic field of 50 Oe, which was lower than the Hcl, was applied at 77 K. The values of U0gb were 0.8 and 1.6 eV for the two samples, respectively. The Jct(0) was almost proportional to the U0gb.",

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AU - Murayama, N.

AU - Kodama, Y.

AU - Sakaguchi, S.

AU - Wakai, F.

AU - Michishita, K.

AU - Ikuhara, Y.

PY - 1991/12/1

Y1 - 1991/12/1

N2 - The magnetic field dependence of transport critical current density (Jct(H)) was measured at 77 K for Bi1.84Pb0.34Sr2.03Ca1.9Cu3.06Oy granular superconductors with Jct(0) of 3814 and 7170 A/cm2. From the initial magnetization curve, the lower critical field (Hcl) of the grain was evaluated to be about 100 Oe in all samples. Intergranular pinning potential (U0gb) was evaluated from the time decay of remanent magnetization after a magnetic field of 50 Oe, which was lower than the Hcl, was applied at 77 K. The values of U0gb were 0.8 and 1.6 eV for the two samples, respectively. The Jct(0) was almost proportional to the U0gb.

AB - The magnetic field dependence of transport critical current density (Jct(H)) was measured at 77 K for Bi1.84Pb0.34Sr2.03Ca1.9Cu3.06Oy granular superconductors with Jct(0) of 3814 and 7170 A/cm2. From the initial magnetization curve, the lower critical field (Hcl) of the grain was evaluated to be about 100 Oe in all samples. Intergranular pinning potential (U0gb) was evaluated from the time decay of remanent magnetization after a magnetic field of 50 Oe, which was lower than the Hcl, was applied at 77 K. The values of U0gb were 0.8 and 1.6 eV for the two samples, respectively. The Jct(0) was almost proportional to the U0gb.

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Intergranular pinning potential and transport current path in BiPbSrCaCuO polycrystal superconductor

Abstract

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