MAGNETIC FIELD AND TEMPERATURE DEPENDENCE OF THERMALLY ACTIVATED DISSIPATION IN EPITAXIAL THIN FILMS OF YBa2 (Cu1-xZnx)3O7-d

Autor:	Robert Deltour, Rares Stiufiuc, T. Jurcut, G. Stiufiuc, Aurel Pop, Gheorghe Ilonca, C. Beiuseanu, M. Ye, C. Lung, E. Mococean
Rok vydání:	2001
Předmět:	Materials science Flux pinning Condensed matter physics Field (physics) Statistical and Nonlinear Physics Activation energy Thin film Dissipation Condensed Matter Physics Epitaxy Scaling Magnetic field
Zdroj:	Modern Physics Letters B. 15:949-957
ISSN:	1793-6640 0217-9849
DOI:	10.1142/s0217984901002786
Popis:	The scaling behavior of the effective activation energy of high-quality epitaxial c-oriented YBa 2( Cu 1-x Zn x)3 O 7-d thin films has been studied as a function of temperature and magnetic field. For all samples, the effective activation energy scales as U(T, μ0H) = U0(1 - T/T c )mHn with exponent m = 1.6 ± 0.02 - 1.3 ± 0.02 and the field scaling 1/μ0H and - ln μ0H for thick films and ultrathin films, respectively. The results are discussed taking account of the influence of the Zn substitution on the flux pinning in epitaxial YBa 2( Cu 1-x Zn x)3 O 7-d thin films.
Databáze:	OpenAIRE
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