Superconductors for high-field use at 77 K

M. Muralidhar; N. Sakai; M. Jirsa; M. Murakami

doi:10.1016/S0921-4534(03)01218-8

Superconductors for high-field use at 77 K

M. Muralidhar, N. Sakai, M. Jirsa, M. Murakami

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

3 Citations (Scopus)

Abstract

Magnetic measurements of (Nd_0.33Eu_0.38Gd _0.28)Ba₂Cu₃O_y showed an exceptionally high-irreversibility field. This feature was always correlated with the presence of a superconducting matter modulation and formation of a special nanometer-scale lamellar structure. High-magnification scanning tunneling microscope observations revealed that such nanoscopic lamellas consist of arrays of aligned NEG-rich clusters of 3-4 nm in size. Routinely prepared NEG-123 samples with Nd:Eu:Gd = 1:1:1 exhibit B_irr of around 7 T, while the material with Nd:Eu:Gd = 1:1.25:0.85 combined with addition of 5 mol% 211 secondary phase exhibits the irreversibility line above 14 T at 77 K (H_a∥c-axis).

Original language	English
Pages (from-to)	567-570
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	392-396
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(03)01218-8
Publication status	Published - 2003 Oct
Externally published	Yes
Event	Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan Duration: 2002 Nov 11 → 2002 Nov 13

Keywords

Critical current density (J)
Flux pinning
LRE-BaCuO
Melt processing
Scanning tunneling microscope

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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10.1016/S0921-4534(03)01218-8

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title = "Superconductors for high-field use at 77 K",

abstract = "Magnetic measurements of (Nd0.33Eu0.38Gd 0.28)Ba2Cu3Oy showed an exceptionally high-irreversibility field. This feature was always correlated with the presence of a superconducting matter modulation and formation of a special nanometer-scale lamellar structure. High-magnification scanning tunneling microscope observations revealed that such nanoscopic lamellas consist of arrays of aligned NEG-rich clusters of 3-4 nm in size. Routinely prepared NEG-123 samples with Nd:Eu:Gd = 1:1:1 exhibit Birr of around 7 T, while the material with Nd:Eu:Gd = 1:1.25:0.85 combined with addition of 5 mol% 211 secondary phase exhibits the irreversibility line above 14 T at 77 K (Ha∥c-axis).",

keywords = "Critical current density (J), Flux pinning, LRE-BaCuO, Melt processing, Scanning tunneling microscope",

author = "M. Muralidhar and N. Sakai and M. Jirsa and M. Murakami",

note = "Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications. M.J. acknowledges support from grant no. A1010919/99 of GA ASCR.; Proceedings of the 15th International Symposium on Superconduc ; Conference date: 11-11-2002 Through 13-11-2002",

year = "2003",

month = oct,

doi = "10.1016/S0921-4534(03)01218-8",

language = "English",

volume = "392-396",

pages = "567--570",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

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TY - JOUR

T1 - Superconductors for high-field use at 77 K

AU - Muralidhar, M.

AU - Sakai, N.

AU - Jirsa, M.

AU - Murakami, M.

N1 - Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications. M.J. acknowledges support from grant no. A1010919/99 of GA ASCR.

PY - 2003/10

Y1 - 2003/10

N2 - Magnetic measurements of (Nd0.33Eu0.38Gd 0.28)Ba2Cu3Oy showed an exceptionally high-irreversibility field. This feature was always correlated with the presence of a superconducting matter modulation and formation of a special nanometer-scale lamellar structure. High-magnification scanning tunneling microscope observations revealed that such nanoscopic lamellas consist of arrays of aligned NEG-rich clusters of 3-4 nm in size. Routinely prepared NEG-123 samples with Nd:Eu:Gd = 1:1:1 exhibit Birr of around 7 T, while the material with Nd:Eu:Gd = 1:1.25:0.85 combined with addition of 5 mol% 211 secondary phase exhibits the irreversibility line above 14 T at 77 K (Ha∥c-axis).

AB - Magnetic measurements of (Nd0.33Eu0.38Gd 0.28)Ba2Cu3Oy showed an exceptionally high-irreversibility field. This feature was always correlated with the presence of a superconducting matter modulation and formation of a special nanometer-scale lamellar structure. High-magnification scanning tunneling microscope observations revealed that such nanoscopic lamellas consist of arrays of aligned NEG-rich clusters of 3-4 nm in size. Routinely prepared NEG-123 samples with Nd:Eu:Gd = 1:1:1 exhibit Birr of around 7 T, while the material with Nd:Eu:Gd = 1:1.25:0.85 combined with addition of 5 mol% 211 secondary phase exhibits the irreversibility line above 14 T at 77 K (Ha∥c-axis).

KW - Critical current density (J)

KW - Flux pinning

KW - LRE-BaCuO

KW - Melt processing

KW - Scanning tunneling microscope

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DO - 10.1016/S0921-4534(03)01218-8

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AN - SCOPUS:0042283736

SN - 0921-4534

VL - 392-396

SP - 567

EP - 570

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - PART 1

T2 - Proceedings of the 15th International Symposium on Superconduc

Y2 - 11 November 2002 through 13 November 2002

ER -

Superconductors for high-field use at 77 K

Abstract

Keywords

ASJC Scopus subject areas

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