Fluctuation induced magneto-conductivity studies in YBa2Cu3O7−δ+xBaZrO3 composite high-Tc superconductors

Mohanta, Annapurna; Behera, D.

doi:10.1016/j.physc.2010.01.038

Cited by 48 publications

(17 citation statements)

References 38 publications

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“…According to the paper [14] we can substitute the following values: ν ≈ 2/3, z ≈ 3/2 and η ≈ 0 to Eq. (5) The second regime is located above the zero critical temperature T c0 and in accordance with literature [5,12] it is dominated by Gaussian uctuations. In this case the mean eld GinzburgLandau theory [11] predicts ν ≈ 1/2, z ≈ 2 and η ≈ 0.…”

Section: Resultssupporting

confidence: 87%

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Thermal Fluctuations of Bismuth Based 1G Tape

et al. 2015

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The thermal uctuations of bismuth based commercial 1G tape were studied near the critical temperature Tc = 110.2 K. The detailed analysis of the temperature dependence of resistivity measurements was made in the temperature region from the zero resistance critical temperature up to 300 K. The thermal uctuations of conductivity were analysed using the AslamazovLarkin microscopic approach and the critical exponents were calculated close to the transition temperature.

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Section: Resultssupporting

confidence: 87%

“…R 0 is the intercept of line tted to measured data in high temperatures. The way to determine the critical exponents was described in detail in the papers [3,5,12].…”

Section: Resultsmentioning

confidence: 99%

Thermal Fluctuations of Bismuth Based 1G Tape

et al. 2015

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“…This method of determination of critical exponents was described in the paper [30]. The critical exponent λ is usually obtained from (2) after the transformation to the logarithmic formula:…”

Section: Resultsmentioning

confidence: 99%

Electrical Conductivity and Magnetic Susceptibility of Thallium 1223-Based Superconductor in the Fluctuation Range

Woch

Zalecki

Giebułtowski

et al. 2018

J Supercond Nov Magn

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The paper reports on the temperature dependencies of the electrical resistivity and the a.c. magnetic susceptibility of the Tl 0.8 Bi 0.3 Sr 1.8 Ba 0.2 Ca 2 Cu 3 O x bulk superconductor measured in the area of the transition from the metallic to the superconducting state. From the resistivity data, the onset temperature T c,onset = 121.6 K, the critical temperature T c50% = 118.8 K, the zero resistance critical temperature obtained using E = 10 −6 V/cm criterion T c0 = 117.9 K, and the width of superconducting transition T = 1.6 K were derived. The thermal fluctuations were examined using the formulae for the conductance: σ = Kε −λ , and for the magnetic susceptibility:λ is the critical exponent, and K and C are constants. The critical exponents in the transition region from the normal to the superconducting state were determined and analyzed. The three-dimensional fluctuations were found to occur in the vicinity of the zero-resistance critical temperature.

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“…where R(T ) is the measured resistance and R R (T ) is the resistance obtained by the linear extrapolation of resistance data from around 170 K, the highest measured temperature, down to temperatures below T c [33].…”

Section: Thermal Uctuationsmentioning

confidence: 99%