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Title: High anisotropy and a dimensionality crossover in the irreversibility behavior of oxygen-deficient YBa sub 2 Cu sub 3 O sub 7 minus y

Abstract

The width in temperature of the reversible, lossy state of high-temperature superconductors (HTS's) in a magnetic field {ital H} depends on the degree of anisotropy. Compared to the parent compound YBa{sub 2}Cu{sub 3}O{sub 7}, we show here that oxygen-deficient, YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}} single crystals, in which {ital T}{sub {ital c}} was varied from 10 to 55 K, are much more anisotropic and that the occurrence of the reversible, lossy state for the {bold H}{parallel}{ital c} axis is consistent with a crossover from three-dimensional (3D) vortex lines to 2D vortices, as recently proposed for the other highly anisotropic HTS's. These results, together with those from Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub {ital x}} and Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub {ital x}}, indicate universal behavior of almost isolated Cu-O bilayer units, albeit with different doping levels, and which display magnetic reversibility controlled by the residual weak interplanar coupling.

Authors:
; ;  [1]; ;  [2];  [3]
  1. Materials Science Divison, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  2. James Franck Institute and the Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States)
  3. Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106 (United States)
Publication Date:
OSTI Identifier:
7048077
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter; (United States)
Additional Journal Information:
Journal Volume: 45:17; Journal ID: ISSN 0163-1829
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM OXIDES; MAGNETIC PROPERTIES; COPPER OXIDES; YTTRIUM OXIDES; ANISOTROPY; HIGH-TC SUPERCONDUCTORS; MONOCRYSTALS; TRANSITION TEMPERATURE; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360207* - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-)

Citation Formats

Gray, K E, Kim, D H, Veal, B W, Seidler, G T, Rosenbaum, T F, and Farrell, D E. High anisotropy and a dimensionality crossover in the irreversibility behavior of oxygen-deficient YBa sub 2 Cu sub 3 O sub 7 minus y. United States: N. p., 1992. Web. doi:10.1103/PhysRevB.45.10071.
Gray, K E, Kim, D H, Veal, B W, Seidler, G T, Rosenbaum, T F, & Farrell, D E. High anisotropy and a dimensionality crossover in the irreversibility behavior of oxygen-deficient YBa sub 2 Cu sub 3 O sub 7 minus y. United States. doi:10.1103/PhysRevB.45.10071.
Gray, K E, Kim, D H, Veal, B W, Seidler, G T, Rosenbaum, T F, and Farrell, D E. Fri . "High anisotropy and a dimensionality crossover in the irreversibility behavior of oxygen-deficient YBa sub 2 Cu sub 3 O sub 7 minus y". United States. doi:10.1103/PhysRevB.45.10071.
@article{osti_7048077,
title = {High anisotropy and a dimensionality crossover in the irreversibility behavior of oxygen-deficient YBa sub 2 Cu sub 3 O sub 7 minus y},
author = {Gray, K E and Kim, D H and Veal, B W and Seidler, G T and Rosenbaum, T F and Farrell, D E},
abstractNote = {The width in temperature of the reversible, lossy state of high-temperature superconductors (HTS's) in a magnetic field {ital H} depends on the degree of anisotropy. Compared to the parent compound YBa{sub 2}Cu{sub 3}O{sub 7}, we show here that oxygen-deficient, YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}} single crystals, in which {ital T}{sub {ital c}} was varied from 10 to 55 K, are much more anisotropic and that the occurrence of the reversible, lossy state for the {bold H}{parallel}{ital c} axis is consistent with a crossover from three-dimensional (3D) vortex lines to 2D vortices, as recently proposed for the other highly anisotropic HTS's. These results, together with those from Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub {ital x}} and Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub {ital x}}, indicate universal behavior of almost isolated Cu-O bilayer units, albeit with different doping levels, and which display magnetic reversibility controlled by the residual weak interplanar coupling.},
doi = {10.1103/PhysRevB.45.10071},
journal = {Physical Review, B: Condensed Matter; (United States)},
issn = {0163-1829},
number = ,
volume = 45:17,
place = {United States},
year = {1992},
month = {5}
}