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

P. L. Gammel; L. F. Schneemeyer; J. V. Wasczak; D. J. Bishop

doi:10.1103/PhysRevLett.61.1666

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

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

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

589 Scopus citations

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 language	English
Pages (from-to)	1666-1669
Number of pages	4
Journal	Physical Review Letters
Volume	61
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.61.1666
State	Published - 1988

Access to Document

10.1103/PhysRevLett.61.1666

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 Schneemeyer, {L. F.} and Wasczak, {J. V.} and Bishop, {D. J.}",

year = "1988",

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",

}

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, L. F.

AU - Wasczak, J. V.

AU - Bishop, D. J.

PY - 1988

Y1 - 1988

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

SN - 0031-9007

VL - 61

SP - 1666

EP - 1669

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

ER -

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

Abstract

Access to Document

Other files and links

Fingerprint

Cite this