Embedding of 211 particles in NEG-123 superconductors

M. Muralidhar; M. R. Koblischka; M. Murakami

doi:10.1088/0953-2048/12/8/313

Embedding of 211 particles in NEG-123 superconductors

M. Muralidhar, M. R. Koblischka, M. Murakami

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

15 Citations (Scopus)

Abstract

We report on the embedding of insulating 211 particles into ternary 123 superconductors of the type (Nd_0.33Eu_0.33Gd_0.33)Ba₂Cu₃O_y (NEG). It is found that the externally added 211 particles can act as nucleation sites in order to control the 211 particle size and distribution. As the composition of the added 211 particles also affects the superconducting NEG matrix, we varied the composition of the light rare earth (LRE) elements within the 211 particles while keeping the composition of NEG and the oxygenation procedure constant. Measurements of magnetization loops reveal that the position of the secondary peak can be shifted towards higher values on increasing the Gd content within the 211 particles, whereas the nominal largest J_c values are achieved in the sample with an even LRE ratio. From a pinning force scaling analysis, we find that the peak in the pinning force diagrams can be shifted even up to 0.53, which indicates a further strengthening of the δT_c-pinning mechanism.

Original language	English
Pages (from-to)	555-562
Number of pages	8
Journal	Superconductor Science and Technology
Volume	12
Issue number	8
DOIs	https://doi.org/10.1088/0953-2048/12/8/313
Publication status	Published - 1999 Aug
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/12/8/313

Cite this

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abstract = "We report on the embedding of insulating 211 particles into ternary 123 superconductors of the type (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG). It is found that the externally added 211 particles can act as nucleation sites in order to control the 211 particle size and distribution. As the composition of the added 211 particles also affects the superconducting NEG matrix, we varied the composition of the light rare earth (LRE) elements within the 211 particles while keeping the composition of NEG and the oxygenation procedure constant. Measurements of magnetization loops reveal that the position of the secondary peak can be shifted towards higher values on increasing the Gd content within the 211 particles, whereas the nominal largest Jc values are achieved in the sample with an even LRE ratio. From a pinning force scaling analysis, we find that the peak in the pinning force diagrams can be shifted even up to 0.53, which indicates a further strengthening of the δTc-pinning mechanism.",

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AU - Muralidhar, M.

AU - Koblischka, M. R.

AU - Murakami, M.

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N2 - We report on the embedding of insulating 211 particles into ternary 123 superconductors of the type (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG). It is found that the externally added 211 particles can act as nucleation sites in order to control the 211 particle size and distribution. As the composition of the added 211 particles also affects the superconducting NEG matrix, we varied the composition of the light rare earth (LRE) elements within the 211 particles while keeping the composition of NEG and the oxygenation procedure constant. Measurements of magnetization loops reveal that the position of the secondary peak can be shifted towards higher values on increasing the Gd content within the 211 particles, whereas the nominal largest Jc values are achieved in the sample with an even LRE ratio. From a pinning force scaling analysis, we find that the peak in the pinning force diagrams can be shifted even up to 0.53, which indicates a further strengthening of the δTc-pinning mechanism.

AB - We report on the embedding of insulating 211 particles into ternary 123 superconductors of the type (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG). It is found that the externally added 211 particles can act as nucleation sites in order to control the 211 particle size and distribution. As the composition of the added 211 particles also affects the superconducting NEG matrix, we varied the composition of the light rare earth (LRE) elements within the 211 particles while keeping the composition of NEG and the oxygenation procedure constant. Measurements of magnetization loops reveal that the position of the secondary peak can be shifted towards higher values on increasing the Gd content within the 211 particles, whereas the nominal largest Jc values are achieved in the sample with an even LRE ratio. From a pinning force scaling analysis, we find that the peak in the pinning force diagrams can be shifted even up to 0.53, which indicates a further strengthening of the δTc-pinning mechanism.

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Embedding of 211 particles in NEG-123 superconductors

Abstract

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