Flux pinning in melt-processed ternary (Nd-Eu-Gd) and Nd-based superconductors

A. K. Pradhan; M. Muralidhar; Y. Feng; S. Shibata; M. Murakami; K. Nakao; N. Koshizuka

doi:10.1109/77.919869

Flux pinning in melt-processed ternary (Nd-Eu-Gd) and Nd-based superconductors

A. K. Pradhan, M. Muralidhar, Y. Feng, S. Shibata, M. Murakami, K. Nakao, N. Koshizuka

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

We report on the flux pinning and optimization of melt-processed ternary (Nd-Eu-Gd)Ba₂Cu₃O_7-δ bulk materials using magnetization and magneto-transport (quasi-flux transformer technique) measurements. The highest flux pinning was observed for the optimal annealing condition, where twin planes act as correlated pinning in the presence of the optimal second-phase addition. The addition of Ag decreases low-field critical current density, whereas high-field behavior does not change drastically. The results were compared with NdBa₂Cu₃O_7-δ single crystals that show various vortex states with increasing defect density. The melt-processed samples demonstrate very similar behavior to the single crystal. The interplay between the point defect and the twin planes resulting an entangled vortex liquid-state remains valid for both single crystals and melt-processed samples.

Original language	English
Pages (from-to)	3706-3711
Number of pages	6
Journal	IEEE Transactions on Applied Superconductivity
Volume	11
Issue number	1 III
DOIs	https://doi.org/10.1109/77.919869
Publication status	Published - 2001 Mar
Externally published	Yes
Event	2000 Applied Superconductivity Conference - Virginia Beach, VA, United States Duration: 2000 Sept 17 → 2000 Sept 22

Keywords

Critical current density
Flux pinning
Melt-processed bulk materials
Vortex phase-transition

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Flux pinning in melt-processed ternary (Nd-Eu-Gd) and Nd-based superconductors",

abstract = "We report on the flux pinning and optimization of melt-processed ternary (Nd-Eu-Gd)Ba2Cu3O7-δ bulk materials using magnetization and magneto-transport (quasi-flux transformer technique) measurements. The highest flux pinning was observed for the optimal annealing condition, where twin planes act as correlated pinning in the presence of the optimal second-phase addition. The addition of Ag decreases low-field critical current density, whereas high-field behavior does not change drastically. The results were compared with NdBa2Cu3O7-δ single crystals that show various vortex states with increasing defect density. The melt-processed samples demonstrate very similar behavior to the single crystal. The interplay between the point defect and the twin planes resulting an entangled vortex liquid-state remains valid for both single crystals and melt-processed samples.",

keywords = "Critical current density, Flux pinning, Melt-processed bulk materials, Vortex phase-transition",

author = "Pradhan, {A. K.} and M. Muralidhar and Y. Feng and S. Shibata and M. Murakami and K. Nakao and N. Koshizuka",

note = "Funding Information: Manuscript received September 17, 2000. This work was supported by the New Energy and Industrial Development Organization (NEDO). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.; 2000 Applied Superconductivity Conference ; Conference date: 17-09-2000 Through 22-09-2000",

year = "2001",

month = mar,

doi = "10.1109/77.919869",

language = "English",

volume = "11",

pages = "3706--3711",

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TY - JOUR

T1 - Flux pinning in melt-processed ternary (Nd-Eu-Gd) and Nd-based superconductors

AU - Pradhan, A. K.

AU - Muralidhar, M.

AU - Feng, Y.

AU - Shibata, S.

AU - Murakami, M.

AU - Nakao, K.

AU - Koshizuka, N.

N1 - Funding Information: Manuscript received September 17, 2000. This work was supported by the New Energy and Industrial Development Organization (NEDO). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2001/3

Y1 - 2001/3

N2 - We report on the flux pinning and optimization of melt-processed ternary (Nd-Eu-Gd)Ba2Cu3O7-δ bulk materials using magnetization and magneto-transport (quasi-flux transformer technique) measurements. The highest flux pinning was observed for the optimal annealing condition, where twin planes act as correlated pinning in the presence of the optimal second-phase addition. The addition of Ag decreases low-field critical current density, whereas high-field behavior does not change drastically. The results were compared with NdBa2Cu3O7-δ single crystals that show various vortex states with increasing defect density. The melt-processed samples demonstrate very similar behavior to the single crystal. The interplay between the point defect and the twin planes resulting an entangled vortex liquid-state remains valid for both single crystals and melt-processed samples.

AB - We report on the flux pinning and optimization of melt-processed ternary (Nd-Eu-Gd)Ba2Cu3O7-δ bulk materials using magnetization and magneto-transport (quasi-flux transformer technique) measurements. The highest flux pinning was observed for the optimal annealing condition, where twin planes act as correlated pinning in the presence of the optimal second-phase addition. The addition of Ag decreases low-field critical current density, whereas high-field behavior does not change drastically. The results were compared with NdBa2Cu3O7-δ single crystals that show various vortex states with increasing defect density. The melt-processed samples demonstrate very similar behavior to the single crystal. The interplay between the point defect and the twin planes resulting an entangled vortex liquid-state remains valid for both single crystals and melt-processed samples.

KW - Critical current density

KW - Flux pinning

KW - Melt-processed bulk materials

KW - Vortex phase-transition

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SN - 1051-8223

VL - 11

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EP - 3711

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

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T2 - 2000 Applied Superconductivity Conference

Y2 - 17 September 2000 through 22 September 2000

ER -

Flux pinning in melt-processed ternary (Nd-Eu-Gd) and Nd-based superconductors

Abstract

Keywords

ASJC Scopus subject areas

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