Angular dependence of the upper critical field of Bi2.2Sr2Ca0. 8Cu2O8+δ

T. T.M. Palstra; B. Batlogg; L. F. Schneemeyer; R. B. Van Dover; J. V. Waszczak

doi:10.1103/PhysRevB.38.5102

Angular dependence of the upper critical field of Bi2.2Sr2Ca0. 8Cu2O8+δ

T. T.M. Palstra^*, B. Batlogg, L. F. Schneemeyer, R. B. Van Dover, J. V. Waszczak

^*Corresponding author for this work

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Abstract

We have measured the electrical resistivity of Bi2.2Sr2Ca0.8Cu2O8+δ in the vicinity of Tc for various angles between the [CuO2] double layers of the crystal and the magnetic field. Defining Tc at the transition midpoints, we have measured values for -dHc2/dT=45 T/K and -dHc2/dT=0.75 T/K for the magnetic field parallel and perpendicular to the [CuO2] planes, respectively. This results in an anisotropy of a factor 60. The numerical results are sensitive to the definition of Tc and larger values for the anisotropy cannot be excluded. The results are compared with the anisotropic three-dimensional Ginzburg-Landau theory.

Original language	English
Pages (from-to)	5102-5105
Number of pages	4
Journal	Physical Review B (Condensed Matter)
Volume	38
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.38.5102
Publication status	Published - 1 Jan 1988
Externally published	Yes

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title = "Angular dependence of the upper critical field of Bi2.2Sr2Ca0. 8Cu2O8+δ",

abstract = "We have measured the electrical resistivity of Bi2.2Sr2Ca0.8Cu2O8+δ in the vicinity of Tc for various angles between the [CuO2] double layers of the crystal and the magnetic field. Defining Tc at the transition midpoints, we have measured values for -dHc2/dT=45 T/K and -dHc2/dT=0.75 T/K for the magnetic field parallel and perpendicular to the [CuO2] planes, respectively. This results in an anisotropy of a factor 60. The numerical results are sensitive to the definition of Tc and larger values for the anisotropy cannot be excluded. The results are compared with the anisotropic three-dimensional Ginzburg-Landau theory.",

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AU - Palstra, T. T.M.

AU - Batlogg, B.

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AU - Van Dover, R. B.

AU - Waszczak, J. V.

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AB - We have measured the electrical resistivity of Bi2.2Sr2Ca0.8Cu2O8+δ in the vicinity of Tc for various angles between the [CuO2] double layers of the crystal and the magnetic field. Defining Tc at the transition midpoints, we have measured values for -dHc2/dT=45 T/K and -dHc2/dT=0.75 T/K for the magnetic field parallel and perpendicular to the [CuO2] planes, respectively. This results in an anisotropy of a factor 60. The numerical results are sensitive to the definition of Tc and larger values for the anisotropy cannot be excluded. The results are compared with the anisotropic three-dimensional Ginzburg-Landau theory.

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Angular dependence of the upper critical field of Bi2.2Sr2Ca0. 8Cu2O8+δ

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