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[en] Width of critical range in K3C60, Ba1-xKxBiO3, La2-xSrCuO4 and Nd2-xCexCuO4 superconductors is estimated on the basis of experimental data on critical fields, coherence lengthes and penetration depthes. Ginzburg numbers of those compounds are shown to be between 0.5x10-4 and (1-3)x10-3 (La and Nd cuprates), that is, fluctuation additions, for example, for heat capacity at Tc-T=1 K should constitute 5-15% of its jumpvalue
Journal
Sverkhprovodimost': Fizika, Khimiya, Tekhnika; ISSN 0131-5366; 
; CODEN SFKTE6; v. 5(10); p. 1794-1797
; CODEN SFKTE6; v. 5(10); p. 1794-1797