Evidence for weak link and anisotropy limitations on the transport critical current in bulk polycrystalline Y 1 Ba 2 Cu 3 O x

J. W. Ekin, A. I. Braginski, A. J. Panson, M. A. Janocko, D. W. Capone, N. J. Zaluzec, B. Flandermeyer, O. F. De Lima, M. Hong, J. Kwo, Sy-Hwang Liou

Research output: Contribution to journalArticle

253 Citations (Scopus)

Abstract

Measurements of the transport critical-current density (J c ), magnetization J c , and magnetoresistance in a number of bulk sintered samples of Y 1 Ba 2 Cu 3 O x from several different laboratories indicate that the transport J c is limited by weak-link regions between high J c regions. The weak-link J c has a Josephson character, decreasing by two orders of magnitude as the magnetic field is increased from 0.1 to 10 mT at 77 K. An examination of the grain-boundary region in Y 1 Ba 2 Cu 3 O x shows no observable impurities or second phases to the scale of the [001] lattice planes (∼12 Å). The effect of intrinsic conduction anisotropy is discussed. A current-transfer model is proposed in which weak conduction along the c axis plays a role in limiting J c at grain boundaries. Orienting the grains in the powder state during processing may result in enhanced transport J c in bulk conductors.

Original languageEnglish (US)
Pages (from-to)4821-4828
Number of pages8
JournalJournal of Applied Physics
Volume62
Issue number12
DOIs
StatePublished - Dec 1 1987

Fingerprint

critical current
grain boundaries
conduction
anisotropy
conductors
examination
current density
impurities
magnetization
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Evidence for weak link and anisotropy limitations on the transport critical current in bulk polycrystalline Y 1 Ba 2 Cu 3 O x . / Ekin, J. W.; Braginski, A. I.; Panson, A. J.; Janocko, M. A.; Capone, D. W.; Zaluzec, N. J.; Flandermeyer, B.; De Lima, O. F.; Hong, M.; Kwo, J.; Liou, Sy-Hwang.

In: Journal of Applied Physics, Vol. 62, No. 12, 01.12.1987, p. 4821-4828.

Research output: Contribution to journalArticle

Ekin, JW, Braginski, AI, Panson, AJ, Janocko, MA, Capone, DW, Zaluzec, NJ, Flandermeyer, B, De Lima, OF, Hong, M, Kwo, J & Liou, S-H 1987, ' Evidence for weak link and anisotropy limitations on the transport critical current in bulk polycrystalline Y 1 Ba 2 Cu 3 O x ', Journal of Applied Physics, vol. 62, no. 12, pp. 4821-4828. https://doi.org/10.1063/1.338985
Ekin, J. W. ; Braginski, A. I. ; Panson, A. J. ; Janocko, M. A. ; Capone, D. W. ; Zaluzec, N. J. ; Flandermeyer, B. ; De Lima, O. F. ; Hong, M. ; Kwo, J. ; Liou, Sy-Hwang. / Evidence for weak link and anisotropy limitations on the transport critical current in bulk polycrystalline Y 1 Ba 2 Cu 3 O x In: Journal of Applied Physics. 1987 ; Vol. 62, No. 12. pp. 4821-4828.
@article{308da10c1c4d41948e4d857bae7164a7,
title = "Evidence for weak link and anisotropy limitations on the transport critical current in bulk polycrystalline Y 1 Ba 2 Cu 3 O x",
abstract = "Measurements of the transport critical-current density (J c ), magnetization J c , and magnetoresistance in a number of bulk sintered samples of Y 1 Ba 2 Cu 3 O x from several different laboratories indicate that the transport J c is limited by weak-link regions between high J c regions. The weak-link J c has a Josephson character, decreasing by two orders of magnitude as the magnetic field is increased from 0.1 to 10 mT at 77 K. An examination of the grain-boundary region in Y 1 Ba 2 Cu 3 O x shows no observable impurities or second phases to the scale of the [001] lattice planes (∼12 {\AA}). The effect of intrinsic conduction anisotropy is discussed. A current-transfer model is proposed in which weak conduction along the c axis plays a role in limiting J c at grain boundaries. Orienting the grains in the powder state during processing may result in enhanced transport J c in bulk conductors.",
author = "Ekin, {J. W.} and Braginski, {A. I.} and Panson, {A. J.} and Janocko, {M. A.} and Capone, {D. W.} and Zaluzec, {N. J.} and B. Flandermeyer and {De Lima}, {O. F.} and M. Hong and J. Kwo and Sy-Hwang Liou",
year = "1987",
month = "12",
day = "1",
doi = "10.1063/1.338985",
language = "English (US)",
volume = "62",
pages = "4821--4828",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "12",

}

TY - JOUR

T1 - Evidence for weak link and anisotropy limitations on the transport critical current in bulk polycrystalline Y 1 Ba 2 Cu 3 O x

AU - Ekin, J. W.

AU - Braginski, A. I.

AU - Panson, A. J.

AU - Janocko, M. A.

AU - Capone, D. W.

AU - Zaluzec, N. J.

AU - Flandermeyer, B.

AU - De Lima, O. F.

AU - Hong, M.

AU - Kwo, J.

AU - Liou, Sy-Hwang

PY - 1987/12/1

Y1 - 1987/12/1

N2 - Measurements of the transport critical-current density (J c ), magnetization J c , and magnetoresistance in a number of bulk sintered samples of Y 1 Ba 2 Cu 3 O x from several different laboratories indicate that the transport J c is limited by weak-link regions between high J c regions. The weak-link J c has a Josephson character, decreasing by two orders of magnitude as the magnetic field is increased from 0.1 to 10 mT at 77 K. An examination of the grain-boundary region in Y 1 Ba 2 Cu 3 O x shows no observable impurities or second phases to the scale of the [001] lattice planes (∼12 Å). The effect of intrinsic conduction anisotropy is discussed. A current-transfer model is proposed in which weak conduction along the c axis plays a role in limiting J c at grain boundaries. Orienting the grains in the powder state during processing may result in enhanced transport J c in bulk conductors.

AB - Measurements of the transport critical-current density (J c ), magnetization J c , and magnetoresistance in a number of bulk sintered samples of Y 1 Ba 2 Cu 3 O x from several different laboratories indicate that the transport J c is limited by weak-link regions between high J c regions. The weak-link J c has a Josephson character, decreasing by two orders of magnitude as the magnetic field is increased from 0.1 to 10 mT at 77 K. An examination of the grain-boundary region in Y 1 Ba 2 Cu 3 O x shows no observable impurities or second phases to the scale of the [001] lattice planes (∼12 Å). The effect of intrinsic conduction anisotropy is discussed. A current-transfer model is proposed in which weak conduction along the c axis plays a role in limiting J c at grain boundaries. Orienting the grains in the powder state during processing may result in enhanced transport J c in bulk conductors.

UR - http://www.scopus.com/inward/record.url?scp=36549104539&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36549104539&partnerID=8YFLogxK

U2 - 10.1063/1.338985

DO - 10.1063/1.338985

M3 - Article

VL - 62

SP - 4821

EP - 4828

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 12

ER -