Effect of High Valancy Cations on the Intergranular Pinning Energies of (Bi-Pb)2Sr2Ca2Cu3O10+δ Samples

Yazici, D.; Erdem, Murat; Özçelık, Bekir

doi:10.1007/s10948-012-1555-8

Cited by 8 publications

(9 citation statements)

References 43 publications

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“…As can be seen from the graph, ξ(0) varied from 8.9 to 16.8 Å when the Ce content was raised. Similar results have been reported for the coherence length ξ(0) and H c2 (0) values in Bi-based superconductors [19,25,54,55].…”

Section: Resultssupporting

confidence: 88%

“…After the first prediction of flux creep by Anderson [19], many studies have been directed towards the effect of an applied external magnetic field on the resistive transition in order to understand the mechanism of flux pinning and flux motion [20][21][22][23][24][25][26][27]. There are several models for understanding the resistivity broadening under a magnetic field, such as thermally activated flux creep [22], flux flow [21], flux line melting and flux cutting [28].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ce Substitution on the Magnetoresistivity and Flux Pinning Energy of the Bi2Sr2Ca1−x Ce x Cu2O8+δ Superconductors

et al. 2013

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In this study, the effect of Ce doping on the properties of Bi 2 Sr 2 Ca 1−x Ce x Cu 2 O 8+δ ceramic superconductors, with x = 0.0, 0.01, 0.05, 0.1, and 0.25, has been investigated.Samples' precursors were prepared using the conventional solid state method and subsequently textured using the Laser Floating Zone technique. The magnetoresistance measurements were studied under various applied magnetic fields. The activation energies, irreversibility fields (H irr ), upper critical fields (H c2 ) and coherence lengths at 0 K (ξ(0)) were calculated from the resistivity versus temperature (ρ-T ) curves, under DC magnetic fields up to 5 T. The thermally activated flux flow model has been applied in order to calculate the flux pinning energies. The results indicated that H c2 (0) varied from 416.19 to 115 T and the flux pinning energies varied from 1.46 to 0.042 eV at 0 T.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Effect of Ce Substitution on the Magnetoresistivity and Flux Pinning Energy of the Bi2Sr2Ca1−x Ce x Cu2O8+δ Superconductors

et al. 2013

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“…Taking T c values found at zero field in Table 2 Similar results are reported for the coherence length ξ(0) and H C2 (0) values for Bibased superconductors [19,25,65,66].…”

Section: Resultssupporting

confidence: 73%

“…It is rather difficult to realize the mixed state of high temperature superconductors due to their short coherence length, large anisotropy and thermal energy. After the first prediction of flux creep by Anderson [19], large amounts of the research have been recently addressed to the effect of applied external magnetic field on resistive transition in order to better understand the mechanism of flux pinning and flux motion [20][21][22][23][24][25][26]. There are several models for understanding of resistivity broadening under a magnetic field, such as thermally activated flux creep [22], flux flow [21], flux line melting and flux cutting [27], etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Yb-substitution on thermally activated flux creep in the Bi2Sr2Ca1Cu2−xYbxOy superconductors

Gündoğmuş

Özçelık

Sotelo

et al. 2013

J Mater Sci: Mater Electron

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In the present work, Bi 2 Sr 2 CaCu 2-x Yb x O y (x = 0.0, 0.05, 0.1, and 0.25) superconductors were prepared by a polymer matrix route technique, and subsequently used as feed in a laser induced directional solidification (LFZ) process. The X-ray diffraction, DC magnetization and magnetoresistance measurements were studied. All samples consist mainly of the Bi-2212 phase which indicates the performed process is adequate. However, some impurity phases like CaCuO 2 were also detected. We have calculated the hole number using the relation given by Presland, and particle size, Lhkl, using the XRD patterns results. From M-T results, the superconducting transition temperatures, T C , of the samples were found 93, 90, 87, and 85 K, respectively. The activation energies, irreversibility fields (H irr ), upper critical fields (H c2 ) and coherence lengths at 0 K (ξ(0)) were calculated from the resistivity versus temperature (R-T) curves, under DC magnetic fields up to 5 T. The thermally activated flux creep model has been studied in order to calculate the flux pinning energies. The results indicated that H c2 (0) varied from 132 to 30 T and the flux pinning energies varied from 650 to 400 meV at 0 T, with the content of Yb.

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“…TAFC was first pointed out by Anderson [14], at which creep involves bundles of flux lines hopping over the pinning barriers due to the thermal activation although Lorentz force exerted on the flux bundle by the current is smaller than the pinning force. Several researchers have pointed out that the TAFC model is the best model for describing the electrical resistivity broadening data under applied magnetic field for various phases of Bi-based superconductors [20][21][22][23][24][25][26][27][28]. Ambegaokar and Halperin's theory is another approach to study the flux line motion under applied magnetic field [29].…”

Section: T Tmentioning

confidence: 99%

Magnetoresistivity studies for BiPb-2223 phase added by BaSnO3 nanoparticles

Barakat

Habanjar

2017

J Adv Ceram

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Co-precipitation method and conventional solid-state reaction technique were used to synthesize BaSnO 3 nanoparticles and (BaSnO 3 ) x /Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10+δ (0 ≤ x ≤ 1.50 wt%) samples, respectively. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and electrical resistivity data were used to characterize BiPb-2223 phase added by BaSnO 3 nanoparticles. The relative volume fraction and superconducting transition temperature T c of BiPb-2223 phase were enhanced by increasing BaSnO 3 addition up to 0.50 wt%. These parameters were decreased with further increase of x. The resistive transition broadening under different applied DC magnetic fields (0.29-4.40 kG) was analyzed through thermally activated flux creep (TAFC) model and Ambegaokar-Halperin (AH) theory. Improvements of the derived flux pinning energy U, critical current density J c (0) estimated from AH parameter C(B), and upper critical magnetic field c2 (0) B , were recorded by adding BaSnO 3 nanoparticles up to 0.50 wt%, beyond which these parameters were suppressed. The magnetic field dependence of the flux pinning energy and critical current density decreased as a power-law relation, which indicated the single junction sensitivity between the superconducting grains to the applied magnetic field. Furthermore, the increase in the applied magnetic field did not affect the electronic thermal conductivity e  above the superconducting transition temperature and suppressed it below T c .

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Effect of High Valancy Cations on the Intergranular Pinning Energies of (Bi-Pb)2Sr2Ca2Cu3O10+δ Samples

Cited by 8 publications

References 43 publications

Effect of Ce Substitution on the Magnetoresistivity and Flux Pinning Energy of the Bi2Sr2Ca1−x Ce x Cu2O8+δ Superconductors

Effect of Ce Substitution on the Magnetoresistivity and Flux Pinning Energy of the Bi2Sr2Ca1−x Ce x Cu2O8+δ Superconductors

Effect of Yb-substitution on thermally activated flux creep in the Bi2Sr2Ca1Cu2−xYbxOy superconductors

Magnetoresistivity studies for BiPb-2223 phase added by BaSnO3 nanoparticles

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