Magnetic field and temperature dependence of thermal activated dissipation in epitaxial thin films of Bi2Sr2Ca(Cu1-xCox) 2Od superconductors

G. Ilonca, V. Toma, Tzuen-Rong Yang, A. V. Pop, P. Balint, M. Bodea, E. Macocian

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3 Citations (Scopus)

Abstract

The scaling behavior of the effective activation energy of high-quality epitaxial c-oriented Bi2Sr2Ca(Cu1-xCox) 2Od thin films with 0 ≤ x ≥ 0.025 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/Tc)mHn with exponent m = 1.25 ± 0.03, n = -1/2 and the field scaling 1/μ0H and -Uμ0H for thick films and ultra thin films, respectively. The results are discussed taking account of the influence of the Co substitution with a model in which U(T, H) arises from plastic deformations of the viscous flux liquid above the vortex-glass transition temperature.

Original languageEnglish
Pages (from-to)369-371
Number of pages3
JournalPhysica C: Superconductivity and its Applications
Volume460-462 I
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2007 Sep 1

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Keywords

  • Activation energy
  • Epitaxial films
  • Magnetoresistivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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