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

G. Ilonca; V. Toma; T. R. Yang; A. V. Pop; P. Balint; M. Bodea; E. Macocian

doi:10.1016/j.physc.2007.03.053

Magnetic field and temperature dependence of thermal activated dissipation in epitaxial thin films of Bi₂Sr₂Ca(Cu_1-xCo_x) ₂O_d superconductors

G. Ilonca^*, V. Toma, T. R. Yang, A. V. Pop, P. Balint, M. Bodea, E. Macocian

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The scaling behavior of the effective activation energy of high-quality epitaxial c-oriented Bi₂Sr₂Ca(Cu_1-xCo_x) ₂O_d 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/T_c)^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 language	English
Pages (from-to)	369-371
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	460-462 I
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.03.053
Publication status	Published - 2007 Sept 1

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

Access to Document

10.1016/j.physc.2007.03.053

Cite this

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

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.",

keywords = "Activation energy, Epitaxial films, Magnetoresistivity",

author = "G. Ilonca and V. Toma and Yang, {T. R.} and Pop, {A. V.} and P. Balint and M. Bodea and E. Macocian",

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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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