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

doi:https://doi.org/10.1103/PhysRevLett.66.953

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

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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:

Gammel, P L; Schneemeyer, L F; Bishop, D J ^[1]

AT T Bell Laboratories, Murray Hill, New Jersey 07974 (US)

Publication Date:: 1991-02-18

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.

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                    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

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                    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.

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@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}

}

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