Coupling behavior of Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films

H. C. Yang, H. H. Sung, C. H. Chung, H. E. Horng, C. H. Lin

Research output: Contribution to journalArticle

Abstract

We have measured the resistivity as a function of temperature in a magnetic field at various field angles θ for oxygen-deficient YBCO films and ultrathin YBCO films; θ is the angle between the crystal c axis and the direction of the magnetic field. The angular dependence of the critical field, Hc2, shows a cusplike behaviour at θ=90° for the oxygen-deficient 60 K YBCO films indicating that the Cu-O2 layers are two-dimensional in nature. Both Tc versus θ in a constant field and Hc2 as a function of θ show a plateau at θ=90° for 83 K (zero resistance) ultrathin YBCO films with a thickness of 20 units of the YBCO cell; these results indicate that there is a coupling between the Cu-O2 layers. The dimensionality of the Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films is discussed in terms of the anisotropic Ginzburg-Landau model and the Tinkham thin-film model.

Original languageEnglish
Pages (from-to)467-473
Number of pages7
JournalJournal of Low Temperature Physics
Volume90
Issue number5-6
DOIs
Publication statusPublished - 1993 Mar 1

Fingerprint

Ultrathin films
Oxygen
oxygen
Magnetic fields
Thin films
Crystals
magnetic fields
plateaus
Temperature
electrical resistivity
thin films
cells
crystals

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Coupling behavior of Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films. / Yang, H. C.; Sung, H. H.; Chung, C. H.; Horng, H. E.; Lin, C. H.

In: Journal of Low Temperature Physics, Vol. 90, No. 5-6, 01.03.1993, p. 467-473.

Research output: Contribution to journalArticle

Yang, H. C. ; Sung, H. H. ; Chung, C. H. ; Horng, H. E. ; Lin, C. H. / Coupling behavior of Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films. In: Journal of Low Temperature Physics. 1993 ; Vol. 90, No. 5-6. pp. 467-473.
@article{c461d47f6d154558a28ef2aa19c1d644,
title = "Coupling behavior of Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films",
abstract = "We have measured the resistivity as a function of temperature in a magnetic field at various field angles θ for oxygen-deficient YBCO films and ultrathin YBCO films; θ is the angle between the crystal c axis and the direction of the magnetic field. The angular dependence of the critical field, Hc2, shows a cusplike behaviour at θ=90° for the oxygen-deficient 60 K YBCO films indicating that the Cu-O2 layers are two-dimensional in nature. Both Tc versus θ in a constant field and Hc2 as a function of θ show a plateau at θ=90° for 83 K (zero resistance) ultrathin YBCO films with a thickness of 20 units of the YBCO cell; these results indicate that there is a coupling between the Cu-O2 layers. The dimensionality of the Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films is discussed in terms of the anisotropic Ginzburg-Landau model and the Tinkham thin-film model.",
author = "Yang, {H. C.} and Sung, {H. H.} and Chung, {C. H.} and Horng, {H. E.} and Lin, {C. H.}",
year = "1993",
month = "3",
day = "1",
doi = "10.1007/BF00681892",
language = "English",
volume = "90",
pages = "467--473",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "Springer New York",
number = "5-6",

}

TY - JOUR

T1 - Coupling behavior of Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films

AU - Yang, H. C.

AU - Sung, H. H.

AU - Chung, C. H.

AU - Horng, H. E.

AU - Lin, C. H.

PY - 1993/3/1

Y1 - 1993/3/1

N2 - We have measured the resistivity as a function of temperature in a magnetic field at various field angles θ for oxygen-deficient YBCO films and ultrathin YBCO films; θ is the angle between the crystal c axis and the direction of the magnetic field. The angular dependence of the critical field, Hc2, shows a cusplike behaviour at θ=90° for the oxygen-deficient 60 K YBCO films indicating that the Cu-O2 layers are two-dimensional in nature. Both Tc versus θ in a constant field and Hc2 as a function of θ show a plateau at θ=90° for 83 K (zero resistance) ultrathin YBCO films with a thickness of 20 units of the YBCO cell; these results indicate that there is a coupling between the Cu-O2 layers. The dimensionality of the Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films is discussed in terms of the anisotropic Ginzburg-Landau model and the Tinkham thin-film model.

AB - We have measured the resistivity as a function of temperature in a magnetic field at various field angles θ for oxygen-deficient YBCO films and ultrathin YBCO films; θ is the angle between the crystal c axis and the direction of the magnetic field. The angular dependence of the critical field, Hc2, shows a cusplike behaviour at θ=90° for the oxygen-deficient 60 K YBCO films indicating that the Cu-O2 layers are two-dimensional in nature. Both Tc versus θ in a constant field and Hc2 as a function of θ show a plateau at θ=90° for 83 K (zero resistance) ultrathin YBCO films with a thickness of 20 units of the YBCO cell; these results indicate that there is a coupling between the Cu-O2 layers. The dimensionality of the Cu-O2 layers in oxygen-deficient YBCO films and ultrathin YBCO films is discussed in terms of the anisotropic Ginzburg-Landau model and the Tinkham thin-film model.

UR - http://www.scopus.com/inward/record.url?scp=34250073270&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34250073270&partnerID=8YFLogxK

U2 - 10.1007/BF00681892

DO - 10.1007/BF00681892

M3 - Article

AN - SCOPUS:34250073270

VL - 90

SP - 467

EP - 473

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 5-6

ER -