Transport current density of (Bi1.6Pb0.4)Sr2Ca2Cu3O10 superconductor added with different nano-sized ZnO

Advances in Condensed Matter Physics

Abd‐Shukor²

2013

Self Cite

MgO nanopowders with average size 20 and 40 nm were introduced into (Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10 )(MgO) x ( = 0-0.15 wt.%) in the pellet form. The optimum amounts for the highest transport critical current density were = 0.10 and 0.01 wt.% for 20 and 40 nm MgO, respectively. These results were used to fabricate MgO added (Bi, Pb)-2223/Ag sheathed tapes using the powder-intube method. The tapes were sintered at 845 ∘ C for 50 h and 100 h. The structure, microstructure, and of the tapes were determined. The temperature and magnetic field dependence of for the MgO added tapes exhibited a significant enhancement compared with the nonadded tapes. of 20 nm MgO added tape was higher compared with the 40 nm MgO added tape. A higher was obtained when the tapes were sintered for 100 h. The increase in can be explained as the increase of the flux pinning strength by nanosized MgO. The nanoparticle with size closer to the coherence length was more effective in enhancing .

“…Nanoparticles have been used as pinning centers to improve (e.g., [6][7][8][9]). Pinning center with size larger than the coherence length was suggested to improve [10].…”

Section: Introductionmentioning

confidence: 99%

Electrical Transport Properties of (Bi_1.6Pb_0.4Sr₂Ca₂Cu₃O₁₀)/Ag Tapes with Different Nanosized MgO

Advances in Condensed Matter Physics

Abd‐Shukor²

2013

Self Cite

“…The PbO added samples enhanced J c and all prepared samples showed degradation of the J c with increasing the temperature. [6][7].…”

Section: Resultsmentioning

confidence: 99%

“…Nanoparticles such as SnO 2 [5] , NiFe 2 O 4 [6], ZnO [7], and Al 2 O 3 [8] have been added to (Bi,Pb)-2223. These reports showed improvement in J c .…”

Section: Introductionmentioning

confidence: 99%

Effect of nanosized PbO on the electrical transport properties of (Bi1.6Pb0.4)Sr2Ca2Cu3O10 superconductor

AIP Conference Proceedings

Abd‐Shukor²

2013

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Abstract. The effect of nanosized PbO additions on the superconducting properties of (Bi, Pb)-2223(PbO)x (x = 0 -0.15 wt. %) prepared by the co-precipitation method was studied. The structure and the microstructure of samples were examined by powder XRD and SEM, respectively. The transport critical current density (J c ), onset transition temperature (T c onset ) and zero resistance temperature (T c zero ) were determined by using four-probe method. It was observed that PbO additions enhanced J c for all added samples. The x = 0.05 wt. % sample showed the highest J c (19.3 and 11.3 A/cm 2 at 30 and 77 K, respectively) This study showed that the addition of PbO, as a result of existence of the effective artificial pinning, provided extra flux pinning centers in the (Bi, Pb)-2223 superconductor.

“…Transport critical current density at 30 K of (Bi 1.6 Pb 0.4 )Sr 2 Ca 2 Cu 3 O 10 with addition of 6 and 30 nm ZnO[16].…”

mentioning

confidence: 99%

Effect of nanoparticles with different size on the transport critical current density of Bi1.6Pb0.4Sr2Ca2Cu3O10 superconductor

Abd‐Shukor

AIP Conference Proceedings

Agail

2014

Self Cite

In general, for a nanoparticle to act as a pinning center, the size L should be larger than the coherence length, x and smaller than the penetration depth, λ. In this paper we compared the effects of different nano-sized particles (where x < L < λ), MgO (20 and 40 nm) versus ZnO (6 and 30 nm) on the transport critical current density of the Bi-based superconductors. All nanoparticle added samples showed higher transport critical current density, J c compared with the non-added samples. In Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10 (MgO) x , the 20 nm MgO added samples showed a higher J c compared with the 40 nm MgO added samples. The 6 nm ZnO added samples also showed higher J c compared to the 30 nm added samples. These results showed that the size of flux pinning center is important in enhancing J c and particle with size closer to the coherence length showed higher transport critical current density.