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The Upper Critical Magnetic Field of Superconducting YBa2(Cu1-xNix)3O7

Published online by Cambridge University Press:  28 February 2011

Youwen Xu ,
A. R. Moodenbaugh  and
M. Suenaga
Youwen Xu
Affiliation:
Materials Science Division, Brookhaven National Lab., Upton, NY 11973
A. R. Moodenbaugh
Affiliation:
Materials Science Division, Brookhaven National Lab., Upton, NY 11973
M. Suenaga
Affiliation:
Materials Science Division, Brookhaven National Lab., Upton, NY 11973
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Abstract

The upper critical magnetic field of a series samples of YBa2(Cu1-xNix)3O7 is measured. Other related parameters, such as the lower critical magnetic field Hc1, the Ginsberg-Landau parameter k, the jump in the specific heat ∆C/Tc, the superconducting coherence length ξ, and the penetration depth λ, are calculated from Tc, dHc2/dT and dM/dH. The results show that Hc2(0), and consequently ξ(0), are essentially constant, but Hc and ∆C/Tc decrease with increasing Ni content.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 1037
Copyright
Copyright © Materials Research Society 1990

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