Effect of magnetic field and temperature on the voltage-current characteristics of YBCO superconductor

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

doi:10.1007/bf00768509

Cited by 2 publications

(2 citation statements)

References 11 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: 63%

“…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: 63%

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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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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Effect of magnetic field and temperature on the voltage-current characteristics of YBCO superconductor

Cited by 2 publications

References 11 publications

Voltage-current characteristics of the thallium-based ceramic superconductors

Voltage-current characteristics of the thallium-based ceramic superconductors

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

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