skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: SQUID picovoltometry of YBa sub 2 Cu sub 3 O sub 7 single crystals: Evidence for a finite-temperature phase transition in the high-field vortex state

Abstract

Using a SQUID picovoltmeter, we have measured current-voltage curves of YBa{sub 2}Cu{sub 3}O{sub 7} microtwinned crystals as a function of temperature in fields from 1 to 6 T. The data constitute evidence for a finite-temperature phase transition in the vortex state. Exponents derived within the framework of the vortex-glass model are found to be similar to thin-film values. Strongly temperature-dependent correlations involving up to 10{sup 5} vortices near the transition, combined with the qualitative failure of thermal-activation models to fit our data, support the existence of a phase transition.

Authors:
; ;  [1]
  1. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (US)
Publication Date:
OSTI Identifier:
5854583
Resource Type:
Journal Article
Journal Name:
Physical Review Letters; (USA)
Additional Journal Information:
Journal Volume: 66:7; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM OXIDES; ELECTRIC CONDUCTIVITY; COPPER OXIDES; YTTRIUM OXIDES; EXPERIMENTAL DATA; HIGH-TC SUPERCONDUCTORS; LOW TEMPERATURE; MAGNETIC FIELDS; MAGNETIC FLUX; MONOCRYSTALS; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; SQUID DEVICES; TEMPERATURE DEPENDENCE; TWINNING; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; DATA; DIAGRAMS; ELECTRICAL PROPERTIES; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; INFORMATION; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTING DEVICES; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Gammel, P L, Schneemeyer, L F, and Bishop, D J. SQUID picovoltometry of YBa sub 2 Cu sub 3 O sub 7 single crystals: Evidence for a finite-temperature phase transition in the high-field vortex state. United States: N. p., 1991. Web. doi:10.1103/PhysRevLett.66.953.
Gammel, P L, Schneemeyer, L F, & Bishop, D J. SQUID picovoltometry of YBa sub 2 Cu sub 3 O sub 7 single crystals: Evidence for a finite-temperature phase transition in the high-field vortex state. United States. https://doi.org/10.1103/PhysRevLett.66.953
Gammel, P L, Schneemeyer, L F, and Bishop, D J. Mon . "SQUID picovoltometry of YBa sub 2 Cu sub 3 O sub 7 single crystals: Evidence for a finite-temperature phase transition in the high-field vortex state". United States. https://doi.org/10.1103/PhysRevLett.66.953.
@article{osti_5854583,
title = {SQUID picovoltometry of YBa sub 2 Cu sub 3 O sub 7 single crystals: Evidence for a finite-temperature phase transition in the high-field vortex state},
author = {Gammel, P L and Schneemeyer, L F and Bishop, D J},
abstractNote = {Using a SQUID picovoltmeter, we have measured current-voltage curves of YBa{sub 2}Cu{sub 3}O{sub 7} microtwinned crystals as a function of temperature in fields from 1 to 6 T. The data constitute evidence for a finite-temperature phase transition in the vortex state. Exponents derived within the framework of the vortex-glass model are found to be similar to thin-film values. Strongly temperature-dependent correlations involving up to 10{sup 5} vortices near the transition, combined with the qualitative failure of thermal-activation models to fit our data, support the existence of a phase transition.},
doi = {10.1103/PhysRevLett.66.953},
url = {https://www.osti.gov/biblio/5854583}, journal = {Physical Review Letters; (USA)},
issn = {0031-9007},
number = ,
volume = 66:7,
place = {United States},
year = {1991},
month = {2}
}