A new technique for pinning enhancement in ternary REBa2Cu3Oy systems

M. Muralidhar; M. Murakami

doi:10.1016/S0921-4534(02)01509-5

A new technique for pinning enhancement in ternary REBa₂Cu₃O_y systems

M. Muralidhar, M. Murakami

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

11 Citations (Scopus)

Abstract

We have studied the effects of sub-micron Gd₂BaCuO₅ (Gd-211) particles on the microstructure and the magnetic properties of ternary melt-textured superconductors (Nd_0.33Eu_0.33Gd_0.33)Ba₂Cu₃O_y, (Nd_0.33Sm_0.33Gd_0.33)Ba₂Cu₃O_y, and (Sm_0.33Eu_0.33Gd_0.33)Ba₂Cu₃O_y. High-resolution transmission electron microscopic observations showed that there is strong compositional fluctuation in the REBa₂Cu₃O_y matrix, and the RE rich clusters 3-10 nm in size are distributed in the matrix, which are the candidates for pinning centers. Magnetization measurements revealed that a strongly developed fishtail is observed in all the samples. The peak position, its height, and irreversibility field is dependent on the chemical composition. The NSG-123 sample with 10 mol% Gd-211 exhibited the critical current density of 100 kAcm^-2 at 77 K and 2 T for H∥c-axis.

Original language	English
Pages (from-to)	627-630
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01509-5
Publication status	Published - 2002 Oct 1
Externally published	Yes

Keywords

Critical current density
Flux pinning
Gd-211
Melt-textured
REBaCuO

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 = "A new technique for pinning enhancement in ternary REBa2Cu3Oy systems",

abstract = "We have studied the effects of sub-micron Gd2BaCuO5 (Gd-211) particles on the microstructure and the magnetic properties of ternary melt-textured superconductors (Nd0.33Eu0.33Gd0.33)Ba2Cu3 Oy, (Nd0.33Sm0.33Gd0.33)Ba2Cu3 Oy, and (Sm0.33Eu0.33Gd0.33)Ba2Cu3 Oy. High-resolution transmission electron microscopic observations showed that there is strong compositional fluctuation in the REBa2Cu3Oy matrix, and the RE rich clusters 3-10 nm in size are distributed in the matrix, which are the candidates for pinning centers. Magnetization measurements revealed that a strongly developed fishtail is observed in all the samples. The peak position, its height, and irreversibility field is dependent on the chemical composition. The NSG-123 sample with 10 mol% Gd-211 exhibited the critical current density of 100 kAcm-2 at 77 K and 2 T for H∥c-axis.",

keywords = "Critical current density, Flux pinning, Gd-211, Melt-textured, REBaCuO",

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

note = "Funding Information: This work was supported by New Energy and Industrial Technology Development Organization (NEDO) as a part of its Research and Development of Fundamental Technologies for Superconductor Applications.",

year = "2002",

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AU - Murakami, M.

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N2 - We have studied the effects of sub-micron Gd2BaCuO5 (Gd-211) particles on the microstructure and the magnetic properties of ternary melt-textured superconductors (Nd0.33Eu0.33Gd0.33)Ba2Cu3 Oy, (Nd0.33Sm0.33Gd0.33)Ba2Cu3 Oy, and (Sm0.33Eu0.33Gd0.33)Ba2Cu3 Oy. High-resolution transmission electron microscopic observations showed that there is strong compositional fluctuation in the REBa2Cu3Oy matrix, and the RE rich clusters 3-10 nm in size are distributed in the matrix, which are the candidates for pinning centers. Magnetization measurements revealed that a strongly developed fishtail is observed in all the samples. The peak position, its height, and irreversibility field is dependent on the chemical composition. The NSG-123 sample with 10 mol% Gd-211 exhibited the critical current density of 100 kAcm-2 at 77 K and 2 T for H∥c-axis.

AB - We have studied the effects of sub-micron Gd2BaCuO5 (Gd-211) particles on the microstructure and the magnetic properties of ternary melt-textured superconductors (Nd0.33Eu0.33Gd0.33)Ba2Cu3 Oy, (Nd0.33Sm0.33Gd0.33)Ba2Cu3 Oy, and (Sm0.33Eu0.33Gd0.33)Ba2Cu3 Oy. High-resolution transmission electron microscopic observations showed that there is strong compositional fluctuation in the REBa2Cu3Oy matrix, and the RE rich clusters 3-10 nm in size are distributed in the matrix, which are the candidates for pinning centers. Magnetization measurements revealed that a strongly developed fishtail is observed in all the samples. The peak position, its height, and irreversibility field is dependent on the chemical composition. The NSG-123 sample with 10 mol% Gd-211 exhibited the critical current density of 100 kAcm-2 at 77 K and 2 T for H∥c-axis.

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KW - Melt-textured

KW - REBaCuO

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