Journal ArticleDOI
The effect of Bi-2212 phase on the weak link behavior of Bi-2223 superconductors
Hadi Salamati,Parviz Kameli +1 more
TLDR
In this paper, a systematic study of the weak link behavior for (Bi,Pb)2Sr2Ca2Cu3Oy (Bi-2223) polycrystalline samples has been done using the electrical resistivity and AC susceptibility techniques.Abstract:
A systematic study of the weak link behavior for (Bi,Pb)2Sr2Ca2Cu3Oy (Bi-2223) polycrystalline samples has been done using the electrical resistivity and AC susceptibility techniques. In this project, we have prepared a series of Bi-2223 samples with different fractions of Bi-2212 phase and investigated its effect on the intergranular properties. It was found that the Bi-2212 phase exist within the grain boundaries, play a role of weak links and consequently reduces the intergranular coupling. Analysis of the temperature dependence of the AC susceptibility near the transition temperature (Tc) has been done employing Bean’s critical state model. The observed variation of intergranular critical current densities (Jc) with temperature indicates that the Jc decreases with the amount of Bi-2212 phase.read more
Citations
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Journal ArticleDOI
Synthesis and Magnetic Properties of Bi 1.7 Pb 0.3 Sr 2 Ca 2 Cu 3 O 10+ δ Added with Nano Y
TL;DR: In this paper, the effects of the addition of yttrium nanoparticles to the superconducting system, nano Y2O3 was introduced by small weight percentages (0.2, 0.4,0.8, and 1.0 wt%) in the first step of the synthesis process.
Journal ArticleDOI
How Grain-Boundaries Influence the Intergranular Critical Current Density of Cu 1− x Tl x Ba 2 Ca 3 Cu 4 O 12− δ Superconductor Thin Films?
Nawazish A. Khan,M. Mumtaz +1 more
TL;DR: In this paper, the influence of grain boundaries on the intergranular critical current density (Jcffff c) has also been investigated and it was observed that n=1 gives a best fit for the Jcffff c of thallium rich samples and n=2 provides a best fitting for the samples with small amount of thalium.
Journal ArticleDOI
Study of the thermo-magnetic fluctuations in carbon nano-tubes added Bi-2223 superconductors
A. Saoudel,A. Amira,Y. Boudjadja,N. Mahamdioua,L. Amirouche,Ahmet Varilci,S.P. Altintas,Cabir Terzioglu +7 more
TL;DR: In this article, the effect of addition of carbon nano-tubes (CNT) on the properties of Bi1.6Pb0.4Sr2Ca2Cu3Oy superconductors was investigated.
Journal ArticleDOI
Effect of fluorine doping on phase formation and properties of Bi(Pb)-2223 ceramics
A. Amira,A. Saoudel,Y. Boudjadja,L. Amirouche,N. Mahamdioua,Ahmet Varilci,Mustafa Akdogan,Cabir Terzioglu,M.-F. Mosbah +8 more
TL;DR: In this paper, it was shown that the residual resistivity increases with fluorine content suggesting that the doping introduces structural defects and disorder into the samples, which leads to a reduction of cell volume as well as the a axis component of modulation.
Journal ArticleDOI
Effect of Nb addition on magnetic, structural and superconducting properties of (Bi, Pb)-2223 superconductors
Özlem Bilgili,Kemal Kocabaş +1 more
TL;DR: In this paper, the effects of Nb2O5 addition with different ratios on the structural and magnetic properties of Bi1.7−xPb0.3NbxSr2Ca2Cu3Oy (x = 0.00 −0.20) superconducting samples were investigated.
References
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Journal ArticleDOI
Magnetization of High-Field Superconductors
TL;DR: Experimental results and phenomenological theory based on the sponge model for hysteretic high-field superconductors are given in this article, where the response of the supercondors to alternating fields superimposed upon steady fields is studied.
Journal ArticleDOI
Superconducting transport properties of grain boundaries in YBa2Cu3O7 bicrystals.
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Journal ArticleDOI
Flux creep and activation energies at the grain boundaries of Y-Ba-Cu-O superconductors
M. Nikolo,Ronald B. Goldfarb +1 more
TL;DR: The ac susceptibility of sintered sintering pellets is measured as a function of temperature and ac magnetic field amplitude and frequency to find the value for an intergrain decoupling field, above which flux creep presumably becomes flux flow at the grain boundaries.
Journal ArticleDOI
The atomic origins of reduced critical currents at [001] tilt grain boundaries in YBa2Cu3O7−δ thin films
Nigel D. Browning,James P. Buban,Peter D. Nellist,David P. Norton,M. F. Chisholm,S. J. Pennycook +5 more
TL;DR: In this paper, a combination of atomic resolution Z-contrast imaging and bond valence sum analysis was used to demonstrate that the atomic structure of the grain boundary dominates the transport properties of high-T c oxide superconductors.
Journal ArticleDOI
Double-step behavior of critical current vs. magnetic field in Y-, Bi- and Tl-based bulk high-Tc superconductors
TL;DR: In this article, a double step characteristic is observed at 76 K in the transport critical current as a function of magnetic field (10 -4 T to 10 T) in bulk sintered Y-, Bi-and Tl-based high-T c superconducting materials.
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