Enhanced superconducting performance of melt quenched Bi2Sr2CaCu2O8 (Bi-2212) superconductor

Kumar, Jagdish; Sharma, Devina; Ahluwalia, P. K.; Awana, V. P. S.

doi:10.1016/j.matchemphys.2013.02.016

Cited by 22 publications

(10 citation statements)

References 41 publications

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“…On the other hand, the relatively low T C value obtained from the samples sintered for 120 h was attributed to decomposition of the 2223 phase to the 2201 phase. These values are comparable to those reported for BSCCO superconductors [27][28][29][30][31][32].…”

Section: Characterization Of the Calcined Powdersupporting

confidence: 89%

Synthesis and Characterization of Bi1.6Pb0.4Sr2Ca2Cu3O7 Superconducting Oxide by High-Energy Milling

Darsono

Imaduddin

Raju

et al. 2015

J Supercond Nov Magn

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Superconducting Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 7 was prepared by a solid-state reaction using high-energy milling for the starting materials. The effects of the sintering temperature and time on the phase evolution, microstructure, and superconducting properties were examined by thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and four-point probe resistivity measurements. High-energy milling decreased the precursor particle size to approximately 30 nm with a relatively uniform distribution of multi-compositions. Because of the mechanochemical activation for the starting materials, the reaction temperature was decreased to 750 • C due to the decreased diffusion length required for the solid-state reaction. Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 7 prepared by high-energy milling showed good superconducting properties with T c ∼ 100 K, which is superior to the same material prepared by ball milling and sol-gel routes.

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Section: Characterization Of the Calcined Powdersupporting

confidence: 89%

Synthesis and Characterization of Bi1.6Pb0.4Sr2Ca2Cu3O7 Superconducting Oxide by High-Energy Milling

Darsono

Imaduddin

Raju

et al. 2015

J Supercond Nov Magn

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“…( a ) Temperature dependence of the resistivity measured on bar specimens cut along the X, Y, and Z directions of the tube (geometry in inset); ( b ) its comparison with the literature data for single crystals [1,19] and Bi-2212 bulk samples processed using other techniques [20,21]. …”

Section: Figurementioning

confidence: 99%

Preferred Orientation Contribution to the Anisotropic Normal State Resistivity in Superconducting Melt-Cast Processed Bi2Sr2CaCu2O8+δ

et al. 2017

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We describe how the contribution of crystallographic texture to the anisotropy of the resistivity of polycrystalline samples can be estimated by averaging over crystallographic orientations through a geometric mean approach. The calculation takes into account the orientation distribution refined from neutron diffraction data and literature values for the single crystal resistivity tensor. The example discussed here is a melt-cast processed Bi2Sr2CaCu2O8+δ (Bi-2212) polycrystalline tube in which the main texture component is a <010> fiber texture with relatively low texture strength. Experimentally-measured resistivities along the longitudinal, radial, and tangential directions of the Bi-2212 tube were compared to calculated values and found to be of the same order of magnitude. Calculations for this example and additional simulations for various texture strengths and single crystal resistivity anisotropies confirm that in the case of highly anisotropic phases such as Bi-2212, even low texture strengths have a significant effect on the anisotropy of the resistivity in polycrystalline samples.

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“…The dρ/dT plot shows a high peak at the bulk T c and secondary hump is seen at lower temperature side. The secondary hump is characteristic of the connective nature of the grains pushing the resistance towards zero through grain boundary weak links [7][8][9][10]. Another, important information one can get from the magneto-transport studies in the superconducting transition regime is the Dew-Hughes phenomenon of thermal activation flux flow, (TAFF) [11].…”

Section: Introductionmentioning

confidence: 99%

High field magneto-transport study of YBa2Cu3O7:Agx (x=0.00–0.20)

Rani

Pal

Awana

2014

Physica C: Superconductivity and its Applications

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We report high field (up to 13 Tesla) magneto transport [ρ(T)H] of YBa 2 Cu 3 O 7 (YBCO):Ag x (x= 0.0, 0.1 and 0.2) composites. The transport properties are significantly improved by Ag doping on the insulating grain boundaries of YBCO. Pure and Ag diffused YBCO superconducting samples are synthesised through solid state reaction route. Both pure and Ag doped YBCO are superconducting at below 90K. Though, the T c (ρ=0) of YBCO:Ag samples under applied field of 13 Tesla is around 65K, the same is 45K for pure YBCO under same applied field. The upper critical field [H c2 (0)], being estimated from ρ(T)H is around 70Tesla for pristine sample, and is above 190Tesla for Ag doped samples. The boarding of the resistive transition under applied magnetic field is comparatively less and nearly single step for Ag doped samples, while the same is clearly two step and relatively much larger for the pristine YBCO. The resistive broadening is explained on the basis of changed inter-granular coupling and thermally activated flux flow (TAFF). The TAFF activation energy (U 0 ) is found to be linear with applied magnetic field for all the samples, but with nearly an order of magnitude less value for the Ag doped samples. Summarily, it is shown that inclusion of Ag significantly improves the superconducting performance of YBCO:Ag composites, in particular under applied field. PACS Nos. 74.72. Gh, 74.25.fc, 74.25.Ha

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Enhanced superconducting performance of melt quenched Bi2Sr2CaCu2O8 (Bi-2212) superconductor

Cited by 22 publications

References 41 publications

Synthesis and Characterization of Bi1.6Pb0.4Sr2Ca2Cu3O7 Superconducting Oxide by High-Energy Milling

Synthesis and Characterization of Bi1.6Pb0.4Sr2Ca2Cu3O7 Superconducting Oxide by High-Energy Milling

Preferred Orientation Contribution to the Anisotropic Normal State Resistivity in Superconducting Melt-Cast Processed Bi2Sr2CaCu2O8+δ

High field magneto-transport study of YBa2Cu3O7:Agx (x=0.00–0.20)

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