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Title: Crossover from three-dimensional to two-dimensional vortex fluctuations in the irreversibility line of the Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (0{le}{ital x}{le}0.55) system

Abstract

It is shown that the temperature dependence of the irreversibility line {ital B}({ital T}{asterisk}) of the Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 6.97} (0{le}{ital x}{le}0.55) system, inferred from magnetoresistance measurements, can be described by a Lindemann-type model of a vortex-solid{endash}vortex-fluid phase transition triggered by vortex fluctuations. In this model, the previously observed transition in {ital B}({ital T}{asterisk}) from a power-law temperature dependence near {ital T}{sub {ital c}} to a more rapid dependence below {ital T}{asterisk}/{ital T}{sub {ital c}}{approx_equal}0.6 can be accounted for in terms of a crossover from three-dimensional (3D) to two-dimensional (2D) vortex fluctuations. For different {ital x} values, a lower limit for the anisotropy ratio {gamma} and an upper limit for the crossover magnetic induction {ital B}{sub cr} above which 2D vortex fluctuations dominate were determined. {copyright} {ital 1996 The American Physical Society.}

Authors:
;  [1]
  1. Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California 92093 (United States)
Publication Date:
OSTI Identifier:
278721
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 53; Journal Issue: 5; Other Information: PBD: Feb 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; BARIUM OXIDES; MAGNETIC FLUX; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; PRASEODYMIUM OXIDES; YTTRIUM OXIDES; ANISOTROPY; FLUCTUATIONS; MAGNETIC FIELDS; MAGNETORESISTANCE; PHASE TRANSFORMATIONS; TEMPERATURE DEPENDENCE

Citation Formats

Almasan, C C, and Maple, M B. Crossover from three-dimensional to two-dimensional vortex fluctuations in the irreversibility line of the Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (0{le}{ital x}{le}0.55) system. United States: N. p., 1996. Web. doi:10.1103/PhysRevB.53.2882.
Almasan, C C, & Maple, M B. Crossover from three-dimensional to two-dimensional vortex fluctuations in the irreversibility line of the Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (0{le}{ital x}{le}0.55) system. United States. doi:10.1103/PhysRevB.53.2882.
Almasan, C C, and Maple, M B. Thu . "Crossover from three-dimensional to two-dimensional vortex fluctuations in the irreversibility line of the Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (0{le}{ital x}{le}0.55) system". United States. doi:10.1103/PhysRevB.53.2882.
@article{osti_278721,
title = {Crossover from three-dimensional to two-dimensional vortex fluctuations in the irreversibility line of the Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (0{le}{ital x}{le}0.55) system},
author = {Almasan, C C and Maple, M B},
abstractNote = {It is shown that the temperature dependence of the irreversibility line {ital B}({ital T}{asterisk}) of the Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 6.97} (0{le}{ital x}{le}0.55) system, inferred from magnetoresistance measurements, can be described by a Lindemann-type model of a vortex-solid{endash}vortex-fluid phase transition triggered by vortex fluctuations. In this model, the previously observed transition in {ital B}({ital T}{asterisk}) from a power-law temperature dependence near {ital T}{sub {ital c}} to a more rapid dependence below {ital T}{asterisk}/{ital T}{sub {ital c}}{approx_equal}0.6 can be accounted for in terms of a crossover from three-dimensional (3D) to two-dimensional (2D) vortex fluctuations. For different {ital x} values, a lower limit for the anisotropy ratio {gamma} and an upper limit for the crossover magnetic induction {ital B}{sub cr} above which 2D vortex fluctuations dominate were determined. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.53.2882},
journal = {Physical Review, B: Condensed Matter},
number = 5,
volume = 53,
place = {United States},
year = {1996},
month = {2}
}