Temperature behaviour of irreversibility fields of various Hg-based superconducting ceramics

Schilbe, Peter; Didschuns, I.; Lüders, Klaus; Fuchs, G.; Baenitz, M.; Lokshin, Konstantin A.; Pavlov, D. A.; Антипов, Е.В.; Khan, H.R.

doi:10.1016/s0921-4534(02)01009-2

Cited by 7 publications

(1 citation statement)

References 5 publications

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“…A common method of determining the irreversibility lines is the evaluation of the peak values of the imaginary part of the ac susceptibility signals. In the case of Hg-based high T c (0) superconductivity, double loss peaks near T c (0) are observed in the ac susceptibility measurements at fields below 1 T. This may be due to different pinning mechanisms [16]. Observed loss peaks in the ac susceptibility may be ascribed to: electric field that induces currents inside and around the vortices is responsible for the losses.…”

Section: Out-of-phase Ac Susceptibilitymentioning

confidence: 95%

Irreversibility line of an Ag-doped Hg-based superconductor

Hassen

Kunkel

2010

Supercond. Sci. Technol.

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The effect of doping with Ag of the bulk superconducting Hg 0.3 La 0.7 Ba 2 Ca 3 (Cu 1−x Ag x ) 4 O 10+δ , 0.1 x 0.3 phase (Hg-1234) is presented. The lattice parameter a = 3.824 Å remains constant, while parameter c was found to increase from c = 19.0225 Å (x = 0.0) to 19.08 Å (x = 0.3) with the addition of Ag. The variation of T c versus the c-parameter exhibits a cupola-shaped behavior. The irreversibility line is thermally activated. The logarithmic plot of H irr versus (1 − T irr /T c (0)) shows a crossover temperature reflecting a transition from two-to three-dimensional behavior with increasing temperature. Fitting of the results to different models is discussed. Thermally activated de-pinning according to Matsushita's formula gives the best fit.

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Section: Out-of-phase Ac Susceptibilitymentioning

confidence: 95%