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Title: Anisotropic nature of high-temperature superconductivity in single-crystal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/

Abstract

We report the first contact-free measurements of the upper critical fields, H/sub c//sub 2/(T), of single-crystal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/. In contrast to resistive measurements reported by others, we find that the anisotropy near T/sub c/ is temperature independent in agreement with the expectations of anisotropic Ginzburg-Landau theory. Estimates of the anisotropic Ginzburg-Landau and London parameters are reported. These indicate that despite the large anisotropy in H/sub c//sub 2/ (5:1), the inferred low-temperature interplanar coherence length (xi/sub z/ = 7 A) remains larger than the Cu-O layer spacing of 3.9 A. The superconductivity in Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/ thus remains fundamentally three dimensional in nature for a substantial temperature range below T/sub c/.

Authors:
; ;
Publication Date:
Research Org.:
IBM Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598
OSTI Identifier:
6392704
Resource Type:
Journal Article
Journal Name:
Phys. Rev. Lett.; (United States)
Additional Journal Information:
Journal Volume: 59:10
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM COMPOUNDS; CRITICAL FIELD; SUPERCONDUCTIVITY; COPPER COMPOUNDS; OXYGEN COMPOUNDS; YTTRIUM COMPOUNDS; ANISOTROPY; MONOCRYSTALS; TEMPERATURE DEPENDENCE; ALKALINE EARTH METAL COMPOUNDS; CRYSTALS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; MAGNETIC FIELDS; PHYSICAL PROPERTIES; TRANSITION ELEMENT COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Worthington, T K, Gallagher, W J, and Dinger, T R. Anisotropic nature of high-temperature superconductivity in single-crystal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/. United States: N. p., 1987. Web. doi:10.1103/PhysRevLett.59.1160.
Worthington, T K, Gallagher, W J, & Dinger, T R. Anisotropic nature of high-temperature superconductivity in single-crystal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/. United States. https://doi.org/10.1103/PhysRevLett.59.1160
Worthington, T K, Gallagher, W J, and Dinger, T R. 1987. "Anisotropic nature of high-temperature superconductivity in single-crystal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/". United States. https://doi.org/10.1103/PhysRevLett.59.1160.
@article{osti_6392704,
title = {Anisotropic nature of high-temperature superconductivity in single-crystal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/},
author = {Worthington, T K and Gallagher, W J and Dinger, T R},
abstractNote = {We report the first contact-free measurements of the upper critical fields, H/sub c//sub 2/(T), of single-crystal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/. In contrast to resistive measurements reported by others, we find that the anisotropy near T/sub c/ is temperature independent in agreement with the expectations of anisotropic Ginzburg-Landau theory. Estimates of the anisotropic Ginzburg-Landau and London parameters are reported. These indicate that despite the large anisotropy in H/sub c//sub 2/ (5:1), the inferred low-temperature interplanar coherence length (xi/sub z/ = 7 A) remains larger than the Cu-O layer spacing of 3.9 A. The superconductivity in Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/ thus remains fundamentally three dimensional in nature for a substantial temperature range below T/sub c/.},
doi = {10.1103/PhysRevLett.59.1160},
url = {https://www.osti.gov/biblio/6392704}, journal = {Phys. Rev. Lett.; (United States)},
number = ,
volume = 59:10,
place = {United States},
year = {1987},
month = {9}
}