Evidence from mechanical measurements for flux-lattice melting in single-crystal YBa2Cu3O7 and Bi2.2Sr2Ca0.8Cu2O8

P. L. Gammel, Lynn Schneemeyer, J. V. Wasczak, D. J. Bishop

Research output: Contribution to journalArticle

577 Citations (Scopus)

Abstract

We have studied flux-lattice melting in single crystals of YBa2Cu3O7 and Bi2.2Sr2Ca0.8Cu2O8 using a high-Q mechanical oscillator. In YBa2Cu3O7 with an applied magnetic field Hc^, flux-lattice melting occurs at Hc2 as in a conventional three-dimensional superconductor. However, for Hc^ flux-lattice melting occurs 3.2 K below Hc2. We believe that this is evidence for a transition into a vortex-liquid state similar to that seen in two-dimensional superconducting films. For Bi2.2Sr2Ca0.8Cu2O8 the effect is even more pronounced; with a bulk superconducting transition of 75 K, the flux-lattice melting in this material occurs in both orientations near 30 K.

Original languageEnglish
Pages (from-to)1666-1669
Number of pages4
JournalPhysical Review Letters
Volume61
Issue number14
DOIs
StatePublished - 1 Jan 1988

Fingerprint

mechanical measurement
melting
single crystals
mechanical oscillators
superconducting films
Q factors
vortices
liquids
magnetic fields

Cite this

@article{bee1e5ce68124016ba127ab7e6eab88b,
title = "Evidence from mechanical measurements for flux-lattice melting in single-crystal YBa2Cu3O7 and Bi2.2Sr2Ca0.8Cu2O8",
abstract = "We have studied flux-lattice melting in single crystals of YBa2Cu3O7 and Bi2.2Sr2Ca0.8Cu2O8 using a high-Q mechanical oscillator. In YBa2Cu3O7 with an applied magnetic field Hc^, flux-lattice melting occurs at Hc2 as in a conventional three-dimensional superconductor. However, for Hc^ flux-lattice melting occurs 3.2 K below Hc2. We believe that this is evidence for a transition into a vortex-liquid state similar to that seen in two-dimensional superconducting films. For Bi2.2Sr2Ca0.8Cu2O8 the effect is even more pronounced; with a bulk superconducting transition of 75 K, the flux-lattice melting in this material occurs in both orientations near 30 K.",
author = "Gammel, {P. L.} and Lynn Schneemeyer and Wasczak, {J. V.} and Bishop, {D. J.}",
year = "1988",
month = "1",
day = "1",
doi = "10.1103/PhysRevLett.61.1666",
language = "English",
volume = "61",
pages = "1666--1669",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "14",

}

Evidence from mechanical measurements for flux-lattice melting in single-crystal YBa2Cu3O7 and Bi2.2Sr2Ca0.8Cu2O8. / Gammel, P. L.; Schneemeyer, Lynn; Wasczak, J. V.; Bishop, D. J.

In: Physical Review Letters, Vol. 61, No. 14, 01.01.1988, p. 1666-1669.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Evidence from mechanical measurements for flux-lattice melting in single-crystal YBa2Cu3O7 and Bi2.2Sr2Ca0.8Cu2O8

AU - Gammel, P. L.

AU - Schneemeyer, Lynn

AU - Wasczak, J. V.

AU - Bishop, D. J.

PY - 1988/1/1

Y1 - 1988/1/1

N2 - We have studied flux-lattice melting in single crystals of YBa2Cu3O7 and Bi2.2Sr2Ca0.8Cu2O8 using a high-Q mechanical oscillator. In YBa2Cu3O7 with an applied magnetic field Hc^, flux-lattice melting occurs at Hc2 as in a conventional three-dimensional superconductor. However, for Hc^ flux-lattice melting occurs 3.2 K below Hc2. We believe that this is evidence for a transition into a vortex-liquid state similar to that seen in two-dimensional superconducting films. For Bi2.2Sr2Ca0.8Cu2O8 the effect is even more pronounced; with a bulk superconducting transition of 75 K, the flux-lattice melting in this material occurs in both orientations near 30 K.

AB - We have studied flux-lattice melting in single crystals of YBa2Cu3O7 and Bi2.2Sr2Ca0.8Cu2O8 using a high-Q mechanical oscillator. In YBa2Cu3O7 with an applied magnetic field Hc^, flux-lattice melting occurs at Hc2 as in a conventional three-dimensional superconductor. However, for Hc^ flux-lattice melting occurs 3.2 K below Hc2. We believe that this is evidence for a transition into a vortex-liquid state similar to that seen in two-dimensional superconducting films. For Bi2.2Sr2Ca0.8Cu2O8 the effect is even more pronounced; with a bulk superconducting transition of 75 K, the flux-lattice melting in this material occurs in both orientations near 30 K.

UR - http://www.scopus.com/inward/record.url?scp=24444467396&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.61.1666

DO - 10.1103/PhysRevLett.61.1666

M3 - Article

AN - SCOPUS:24444467396

VL - 61

SP - 1666

EP - 1669

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 14

ER -