Voltage-current characteristics of polycrystalline (Bi,Pb)2Sr2Ca2Cu3O10 superconductor at different magnetic fields and temperatures

Albiss, B. A.; Bocuk, H; Gasanly, Nizami; Özkan, H.

doi:10.1007/bf00768506

Cited by 3 publications

(5 citation statements)

References 8 publications

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“…The selffield limitation of I c is estimated to be quite small for low levels of currents applied in this study [18]. Comparison of the β values for the present Tl-based samples and those of the previously investigated YBCO and BSCCO samples suggests that the Tl-based materials especially Tl-2212 become ohmic at relatively lower fields [10,11]. This can be seen from the following data.…”

Section: Resultssupporting

confidence: 62%

“…To our knowledge, the dependence of I c and β on temperature and magnetic field in polycrystalline Tl-based HTSs in the vicinity of the transition temperature have not been systematically investigated yet. Previously we have reported the V -I characteristics of polycrystalline YBCO and BSCCO [10,11]. As a continuation of these we have studied the V -I behaviours and critical currents of the Tl-based superconductors.…”

Section: Introductionmentioning

confidence: 94%

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Voltage-current characteristics of the thallium-based ceramic superconductors

Özkan¹,

Topal²,

Gasanly³

et al. 1999

Supercond. Sci. Technol.

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Voltage-current (V-I) characteristics of the ceramic Tl2Ba2CaCu2O8 (Tl-2212) and Tl2Ba2Ca2Cu3O10 (Tl-2223) superconductors were studied in magnetic fields up to 80 mT at different temperatures just below the critical temperature. The V-I data were fitted to a power law expression V = I(T,B) in which the exponential parameter is found to decrease rapidly with increase of temperature and magnetic field. In zero magnetic field the slopes of versus T graphs change drastically in a narrow temperature range in which decreases from about 3 to about 2. At temperatures below about 0.8-0.9 Tc the critical current Ic rapidly decreases with magnetic fields up to about 20 mT. This is followed by a more gradual change up to about 60 mT before Ic decreases rapidly to zero in magnetic fields higher than 80 mT. These features of the Tl-based ceramic superconductors are quite similar to those of superconducting tapes. We propose that the lattice anisotropy, preferred orientation and behaviours of the weak and strong links between the grains play an important role in this similarity.

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Section: Resultssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 94%

Voltage-current characteristics of the thallium-based ceramic superconductors

Özkan¹,

Topal²,

Gasanly³

et al. 1999

Supercond. Sci. Technol.

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“…The smearing out of this KT transition seems to be strongly sample-dependent. Also we could not observe such a transition for previous work on polycrystalline Bi-2223 [18] may be because of the wide temperature and magnetic field range used in our measurements. Though our study aimed at grasping a better insight into the power law behaviors and the dissipation mechanisms in TlBa 2 Ca 2 Cu 3 O 9 HTSCs.…”

Section: Resultscontrasting

confidence: 73%

Power law behavior of Tl ₁ Ba ₂ Ca ₂ Cu ₃ O ₉ superconducting tapes

Albiss

El‐Ali

Azez

2004

phys. stat. sol. (c)

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Specimens of Tl 1 Ba 2 Ca 2 Cu 3 O 9 superconducting tapes (Tl-1223) have been prepared using the powder-intube (PIT) method. Dissipative mechanisms and power law behavior were investigated using magnetoresistance measurements and I-V characteristics. The temperature and magnetic field dependences of the resistance R(T,B) were fitted to the Arrhenius relation from which the magnetic field dependence of the pinning energy U 0 (B) was derived. The I-V data were fitted to a power law expression V ~ I α (T,B) in which the exponent α was found to decrease gradually with increase of temperature and magnetic field. The variations of the critical current densities with applied magnetic field J c (B) were also studied. The correlation of the pinning energy to the critical current density was attempted. These results are discussed and explained in terms of the thermally activated flux flow (TAFF), grain boundaries, weak links, and Josephson junctions between the grains.

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“…Comparison of the β values of the present Tl-based samples with those of the previously investigated polycrystalline YBCO and BSCCO samples suggests that the Tl-based ones are the most sensitive to the applied magnetic field [3,11,12]. Our study shows that this sensitivity to magnetic field can be increased even more just by decreasing the pelletization pressure.…”

Section: Resultssupporting

confidence: 57%

“…Our measurements of the V-I characteristics of the Tl-based superconductors reveal that the logarithmic plots of all the V-I data sets are linear, typical for polycrystalline HTSs [11][12][13]. For instance, the inset of Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of pelletization pressure on the structural and transport properties of TlCaBaCuO superconductors

Topal

2007

Physica Status Solidi (a)

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An investigation is reported of the effects of pelletization pressure on the structural and transport properties of polycrystalline TlCaBaCuO samples with nominal composition of Tl2Ba2Ca2Cu3O10–x . The measurements reveal the following interesting results as the pelletization pressure increases: (1) the volume fraction of self‐formed Tl‐2212 phase decreases and the amount of target Tl‐2223 phase increases; and (2) the links between grains become stronger. Consequently, energy dissipation on grain boundaries decreases and critical current increases. The paper also discusses the applicability of thallium samples as magnetic field sensors. It was found that the samples pelletized at low pressures become more sensitive to a magnetic field compared to those pelletized at high pressures. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Voltage-current characteristics of polycrystalline (Bi,Pb)2Sr2Ca2Cu3O10 superconductor at different magnetic fields and temperatures

Cited by 3 publications

References 8 publications

Voltage-current characteristics of the thallium-based ceramic superconductors

Voltage-current characteristics of the thallium-based ceramic superconductors

Power law behavior of Tl ₁ Ba ₂ Ca ₂ Cu ₃ O ₉ superconducting tapes

Influence of pelletization pressure on the structural and transport properties of TlCaBaCuO superconductors

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Voltage-current characteristics of polycrystalline (Bi,Pb)2Sr2Ca2Cu3O10 superconductor at different magnetic fields and temperatures

Cited by 3 publications

References 8 publications

Voltage-current characteristics of the thallium-based ceramic superconductors

Voltage-current characteristics of the thallium-based ceramic superconductors

Power law behavior of Tl 1 Ba 2 Ca 2 Cu 3 O 9 superconducting tapes

Influence of pelletization pressure on the structural and transport properties of TlCaBaCuO superconductors

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Power law behavior of Tl ₁ Ba ₂ Ca ₂ Cu ₃ O ₉ superconducting tapes