TY - JOUR
T1 - Magnetic field and temperature dependence of thermal activated dissipation in epitaxial thin films of Bi2Sr2Ca(Cu1-xCox) 2Od superconductors
AU - Ilonca, G.
AU - Toma, V.
AU - Yang, T. R.
AU - Pop, A. V.
AU - Balint, P.
AU - Bodea, M.
AU - Macocian, E.
PY - 2007/9/1
Y1 - 2007/9/1
N2 - 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.
AB - 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.
KW - Activation energy
KW - Epitaxial films
KW - Magnetoresistivity
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U2 - 10.1016/j.physc.2007.03.053
DO - 10.1016/j.physc.2007.03.053
M3 - Article
AN - SCOPUS:34548309213
SN - 0921-4534
VL - 460-462 I
SP - 369
EP - 371
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - SPEC. ISS.
ER -