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[en] This paper reports on the upper critical magnetic field of a series samples of YBa2(Cu1-xNix)3O7. Other related parameters, such as the lower critical magnetic field Hc1, the Ginsberg-Landau parameter κ, the jump in the specific heat ΔC/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, by Hc and ΔC/Tc decrease with increasing Ni content
Source
Christen, D. (Oak Ridge National Lab., Oak Ridge, TN (United States)); Narayan, J. (North Carolina State Univ., Raleigh, NC (United States)); Schneemeyer, L. (AT and T Laboratories, Murray Hill, NJ (United States)); 1322 p; ISBN 1-55899-057-7; 
; 1990; p. 1037-1040; Materials Research Society; Pittsburgh, PA (United States); Materials Research Society fall meeting; Boston, MA (United States); 27 Nov - 2 Dec 1989; CONF-891119--; Materials Research Society, 9800 McKnight Rd., Suite 327, Pittsburgh, PA 15237 (USA)
; 1990; p. 1037-1040; Materials Research Society; Pittsburgh, PA (United States); Materials Research Society fall meeting; Boston, MA (United States); 27 Nov - 2 Dec 1989; CONF-891119--; Materials Research Society, 9800 McKnight Rd., Suite 327, Pittsburgh, PA 15237 (USA)