Irreversibility field above 14 T at 77 K in (Nd-Eu-Gd) Ba2Cu3Oy

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In (Nd0.33 Eu0.38 Gd0.28) Ba2 a new type of nanometer-scale pinning center was created by choosing an appropriate matrix chemical ratio. Such a pinning center could be controlled via externally added small quantity of 211 (NEG-211 or Gd-211) secondary phase. Microstructure analysis combined with magnetic characterization clarified that the sample with a high irreversibillty field always exhibits chemical modulation and formation of a special nanometer-scale lamellar structure. High magnification STM observations revealed that the nano-Iamellas consist of rows of aligned NEG-rich clusters 3 to 4 nm in size. This new material with the Nd:Eu:Gd ratio of 1:1.25:0.85 combined with 5 mol% 211 secondary phase exhibits the high secondary peak position at around 4.5 T and the irreversibility field over 14 T at 77 K for Ha ∥ c-axis.

Original languageEnglish
Pages (from-to)3091-3094
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2 III
DOIs
Publication statusPublished - 2003 Jun
Externally publishedYes

Fingerprint

Lamellar structures
Modulation
Microstructure
magnification
modulation
microstructure
matrices

Keywords

  • Critical current density
  • Flux pinning
  • Melt-processed bulk materials
  • STM

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Irreversibility field above 14 T at 77 K in (Nd-Eu-Gd) Ba2Cu3Oy. / Miryala, Muralidhar; Sakai, Naomichi; Jirsa, M.; Murakami, Masato.

In: IEEE Transactions on Applied Superconductivity, Vol. 13, No. 2 III, 06.2003, p. 3091-3094.

Research output: Contribution to journalArticle

@article{949023190fd548b992b72b307e7f153d,
title = "Irreversibility field above 14 T at 77 K in (Nd-Eu-Gd) Ba2Cu3Oy",
abstract = "In (Nd0.33 Eu0.38 Gd0.28) Ba2 a new type of nanometer-scale pinning center was created by choosing an appropriate matrix chemical ratio. Such a pinning center could be controlled via externally added small quantity of 211 (NEG-211 or Gd-211) secondary phase. Microstructure analysis combined with magnetic characterization clarified that the sample with a high irreversibillty field always exhibits chemical modulation and formation of a special nanometer-scale lamellar structure. High magnification STM observations revealed that the nano-Iamellas consist of rows of aligned NEG-rich clusters 3 to 4 nm in size. This new material with the Nd:Eu:Gd ratio of 1:1.25:0.85 combined with 5 mol{\%} 211 secondary phase exhibits the high secondary peak position at around 4.5 T and the irreversibility field over 14 T at 77 K for Ha ∥ c-axis.",
keywords = "Critical current density, Flux pinning, Melt-processed bulk materials, STM",
author = "Muralidhar Miryala and Naomichi Sakai and M. Jirsa and Masato Murakami",
year = "2003",
month = "6",
doi = "10.1109/TASC.2003.812111",
language = "English",
volume = "13",
pages = "3091--3094",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2 III",

}

TY - JOUR

T1 - Irreversibility field above 14 T at 77 K in (Nd-Eu-Gd) Ba2Cu3Oy

AU - Miryala, Muralidhar

AU - Sakai, Naomichi

AU - Jirsa, M.

AU - Murakami, Masato

PY - 2003/6

Y1 - 2003/6

N2 - In (Nd0.33 Eu0.38 Gd0.28) Ba2 a new type of nanometer-scale pinning center was created by choosing an appropriate matrix chemical ratio. Such a pinning center could be controlled via externally added small quantity of 211 (NEG-211 or Gd-211) secondary phase. Microstructure analysis combined with magnetic characterization clarified that the sample with a high irreversibillty field always exhibits chemical modulation and formation of a special nanometer-scale lamellar structure. High magnification STM observations revealed that the nano-Iamellas consist of rows of aligned NEG-rich clusters 3 to 4 nm in size. This new material with the Nd:Eu:Gd ratio of 1:1.25:0.85 combined with 5 mol% 211 secondary phase exhibits the high secondary peak position at around 4.5 T and the irreversibility field over 14 T at 77 K for Ha ∥ c-axis.

AB - In (Nd0.33 Eu0.38 Gd0.28) Ba2 a new type of nanometer-scale pinning center was created by choosing an appropriate matrix chemical ratio. Such a pinning center could be controlled via externally added small quantity of 211 (NEG-211 or Gd-211) secondary phase. Microstructure analysis combined with magnetic characterization clarified that the sample with a high irreversibillty field always exhibits chemical modulation and formation of a special nanometer-scale lamellar structure. High magnification STM observations revealed that the nano-Iamellas consist of rows of aligned NEG-rich clusters 3 to 4 nm in size. This new material with the Nd:Eu:Gd ratio of 1:1.25:0.85 combined with 5 mol% 211 secondary phase exhibits the high secondary peak position at around 4.5 T and the irreversibility field over 14 T at 77 K for Ha ∥ c-axis.

KW - Critical current density

KW - Flux pinning

KW - Melt-processed bulk materials

KW - STM

UR - http://www.scopus.com/inward/record.url?scp=0042475635&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042475635&partnerID=8YFLogxK

U2 - 10.1109/TASC.2003.812111

DO - 10.1109/TASC.2003.812111

M3 - Article

VL - 13

SP - 3091

EP - 3094

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 2 III

ER -