Improvement of the superconducting properties in (Nd, Sm, Eu)-Ba-Cu-O using melt-quenched precursors

M. Muralidhar; M. Murakami

doi:10.1016/S0921-4534(98)00592-9

Improvement of the superconducting properties in (Nd, Sm, Eu)-Ba-Cu-O using melt-quenched precursors

M. Muralidhar, M. Murakami

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

4 Citations (Scopus)

Abstract

We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O₂-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE_1+xBa_2-xCu₃O_y precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset T_c exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.

Original language	English
Pages (from-to)	39-42
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	309
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4534(98)00592-9
Publication status	Published - 1998 Dec 1
Externally published	Yes

Keywords

(Nd, Sm, Eu)-Ba-Cu-O
Critical current density
Critical temperature
Melt process
Melt quenching
Peak effect

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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title = "Improvement of the superconducting properties in (Nd, Sm, Eu)-Ba-Cu-O using melt-quenched precursors",

abstract = "We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.",

keywords = "(Nd, Sm, Eu)-Ba-Cu-O, Critical current density, Critical temperature, Melt process, Melt quenching, Peak effect",

author = "M. Muralidhar and M. Murakami",

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TY - JOUR

T1 - Improvement of the superconducting properties in (Nd, Sm, Eu)-Ba-Cu-O using melt-quenched precursors

AU - Muralidhar, M.

AU - Murakami, M.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.

AB - We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.

KW - (Nd, Sm, Eu)-Ba-Cu-O

KW - Critical current density

KW - Critical temperature

KW - Melt process

KW - Melt quenching

KW - Peak effect

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