Electrical Resistivity and Magnetoresistance Studies of (Bi,Pb)-2223 Phase Substituted by Ru

Abou‐Aly, A. I.; Mahmoud, S. A.; Awad, R.; Barakat, M. M.

doi:10.1007/s10948-010-0815-8

Cited by 50 publications

(39 citation statements)

References 49 publications

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“…Their variations versus Ho content are also listed in Table 1. It is found that the lattice parameters a and c for the un-substituted sample are very close to those obtained by Koyama et al [41] and Abou-Aly et al [42]. Moreover, for all substituted samples, the lattice parameter a increases slightly with increasing Ho content while the lattice parameter c decreases significantly.…”

Section: Characterization and Investigationsupporting

confidence: 85%

Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

et al. 2016

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Abstract:The effect of the partial substitution of Ca 2+ by Ho 3+ ions on the electrical and mechanical properties of the superconducting phase (Bi,Pb)-2223 was studied. Superconducting samples of the type (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ were prepared by solid-state reaction technique under ambient pressure, and characterized by means of X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The superconducting transition temperature T c and pseudogap temperature T * were estimated from electrical resistivity measurements, while the critical current density J c was determined from I-V curves. The electrical resistivity data were discussed according to bipolaron model in the absence of thermally excited individual polarons. The sample with x = 0.025 showed the highest phase volume fraction, T c , and J c . Room temperature Vickers microhardness measurements were carried out at different applied loads (0.25-5 N) in order to investigate the performance of the mechanical properties of (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ phase. It was found that all the samples exhibit normal indentation size effect (ISE). The Vickers microhardness number H V increased as x increased from 0 to 0.025. The experimental results were discussed in view of Meyer's law, Hays-Kendall (HK) approach, elastic/plastic deformation (EPD) model, and proportional specimen resistance (PSR) model. The load independent (true) microhardness of (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ superconducting samples showed identical behavior to that of the PSR model.

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Section: Characterization and Investigationsupporting

confidence: 85%

Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

et al. 2016

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“…(2), the obtained values of β versus x are listed in Table 2. The values of β for (BaSnO 3 ) x / BiPb-2223 samples are close to those obtained for BiPb-2223 phase substituted by Ru 4+ ions (β = 0.25-0.36) [27], and in contrary with those obtained for (Mn) x /BiPb-2223 samples (β = 0.45-0.61) [28]. Consequently, there are no expectation values of β as they depend on many factors affected on the pinning energy to the characteristics of crystal structure such as the atoms' real position, weak link quality, and oxygen content [45].…”

Section: Resultssupporting

confidence: 81%

“…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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“…This indicates that there is no structure transition as the Ru-content increases. On the other hand, a slight shift is observed for XRD peaks for Bi 1.8 Pb 0.4 Sr 2 Ca 2.1 Cu 3−x Ru x O 10+δ phase with x ≥ 0.15, indicating the presence of phase change from (Bi,Pb)-2223 to (Bi,Pb)-2212 phase [16,17]. A phase transformation from orthorhombic to tetragonal was observed for GdBa 2 Cu 3−x Ru x O 7−δ phase around x = 0.3 [18].…”

Section: Samples Characterizationmentioning

confidence: 94%

“…The enhancement of both the flux pinning energy and the critical current density was recorded up to x = 0.05. In addition, the effect of Ru substitution on the electrical resistivity behavior under applied magnetic field for (Bi,Pb)-2223 phase was studied by AbouAly et al [16]. Within TAFC model and AH theory, they reported that the partial replacement of Cu 2+ ions by Ru 4+ ions increased the values of flux pinning energy, J c and B c2 up to x = 0.05.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Magnetoresistance Studies of Tl0.5Pb0.5Sr1.6Ba0.4CaCu2−x Ru x O7−δ Superconductor

Abou‐Aly

Awad

Mahmoud

et al. 2011

J Supercond Nov Magn

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Bulk superconducting samples of type Tl 0.5 Pb 0.5 Sr 1.6 Ba 0.4 CaCu 2−x Ru x O 7−δ , (Tl,Pb)/Sr-1212, with 0.0 ≤ x ≤ 0.525 were synthesized by the conventional one-step solid-state reaction technique via a short time, using SrO 2 instead of SrCO 3 . X-ray powder diffraction XRD, scanning electron microscope SEM and the electrical resistivity measurements at different applied dc magnetic fields (0.0-4.4 kG) were performed in order to investigate the effect of Ru 4+ ions substitution on (Tl,Pb)/Sr-1212 phase. Enhancement of the phase formation, the superconducting transition temperature T c and the hole carriers concentration P was observed up to x = 0.075, and they decreased for further increase in x. The magnetoresistance data of these samples were analyzed within the thermally activated flux creep TAFC model and the Ambegaokar and Halperin AH theory. The derived flux pinning energy U , the critical current density J c (0) and the upper critical magnetic field B c2 (0) enhanced up to x = 0.075, beyond which they decreased for further increase in Ru-content. The coherence length at 0 K ζ(0) decreased up to x = 0.075 and increased with x > 0.075. In addition, we reported a comparison between the effect of Ru substitution on the physical properties for Gd-123, (Bi,Pb)-2223 and (Tl,Pb)/Sr-1212 phases.

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Electrical Resistivity and Magnetoresistance Studies of (Bi,Pb)-2223 Phase Substituted by Ru

Cited by 50 publications

References 49 publications

Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

Magnetoresistivity studies for BiPb-2223 phase added by BaSnO3 nanoparticles

Synthesis, Characterization and Magnetoresistance Studies of Tl0.5Pb0.5Sr1.6Ba0.4CaCu2−x Ru x O7−δ Superconductor

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