Improving the superconducting properties of single grain Sm–Ba–Cu–O bulk superconductors fabricated in air by increased control of Sm/Ba substitution effects

2013 ◽  
Vol 26 (9) ◽  
pp. 095012 ◽  
Author(s):  
Y Shi ◽  
M Desmedt ◽  
J Durrell ◽  
A R Dennis ◽  
D A Cardwell
Keyword(s):  
Substitution Effects ◽  
Superconducting Properties ◽  
Bulk Superconductors ◽  
Single Grain ◽  
Ba Substitution

Change of Superconducting Properties of Single-Grain Sm–Ba–Cu–O Bulk by Sm/Ba Substitution Effect

2018 ◽  
Vol 28 (4) ◽  
pp. 1-4 ◽  
Author(s):  
Petra Hajdova ◽  
Michal Rajnak ◽  
Vitaliy Antal ◽  
Liudmila Vojtkova ◽  
Pavel Diko
Keyword(s):  
Substitution Effect ◽  
Superconducting Properties ◽  
Single Grain ◽  
Ba Substitution

The Influence of CeO2 Addition on Microstructure and Superconducting Properties of GdBCO-Ag Single Grain Bulk Superconductors

2021 ◽  
pp. 161697
Author(s):  
Petra Hajdova ◽  
Pavel Diko ◽  
Michal Rajnak ◽  
Jozef Bednarcik ◽  
Vitaliy Antal ◽  
...  
Keyword(s):  
Superconducting Properties ◽  
Bulk Superconductors ◽  
Single Grain ◽  
Grain Bulk

Mg-doped Nd-Ba-Cu-O generic seed crystals for the top-seeded melt growth of large-grain (rare earth)-Ba-Cu-O bulk superconductors

2006 ◽  
Vol 21 (6) ◽  
pp. 1355-1362 ◽  
Author(s):  
Y. Shi ◽  
N. Hari Babu ◽  
K. Iida ◽  
D.A. Cardwell
Keyword(s):  
Rare Earth ◽  
Volume Fraction ◽  
Seed Crystal ◽  
Superconducting Properties ◽  
Seed Crystals ◽  
Bulk Superconductors ◽  
Wide Range ◽  
Single Grain ◽  
Basic Characteristics ◽  
Mg Doped

We report the fabrication of Mg-doped NdBCO generic seed crystals, which have been developed recently for the fabrication of any rare earth (RE) based (RE)-Ba-Cu-O single-grain superconductor, with a wide range of Nd1+xBa2-xCu3-yMgyO7-δ compositions. Three basic characteristics of the seed crystals required for effective seeding of bulk (RE)BCO materials were studied in detail. We report the chemical, crystallographic, microstructural, and superconducting properties of the seeds and demonstrate clearly their potential to process various (RE)BCO superconductors in single-grain form. The melting point, volume fraction of Mg-rich inclusions in the bulk microstructure, and the chemical composition of the Nd1+xBa2-xCu3-yMgyO7-δ superconducting matrix of the seed crystals were studied as a function of initial MgO content. Finally, the suitable range of MgO-content within the generic seed crystal that controls effectively the orientation of the seeded grain without compromising its superconducting properties relative to those of the Mg-free compound is identified based on the wide range of seed crystal compositions investigated.

scholarly journals A robust seeding technique for the growth of single grain (RE)BCO and (RE)BCO–Ag bulk superconductors

2018 ◽  
Vol 31 (4) ◽  
pp. 044003 ◽  
Author(s):  
Devendra K Namburi ◽  
Yunhua Shi ◽  
Anthony R Dennis ◽  
John H Durrell ◽  
David A Cardwell
Keyword(s):  
Bulk Superconductors ◽  
Single Grain

scholarly journals Comparison of the effects of platinum and CeO2on the properties of single grain, Sm–Ba–Cu–O bulk superconductors

2016 ◽  
Vol 29 (12) ◽  
pp. 125002 ◽  
Author(s):  
Wen Zhao ◽  
Yunhua Shi ◽  
Monika Radušovská ◽  
Anthony R Dennis ◽  
John H Durrell ◽  
...  
Keyword(s):  
Bulk Superconductors ◽  
Single Grain

scholarly journals Structural and Superconducting Properties of Thermal Treatment-Synthesised Bulk YBa2Cu3O7−δ Superconductor: Effect of Addition of SnO2 Nanoparticles

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 92 ◽  
Author(s):  
Nur Mohd Yusuf ◽  
Mohd Awang Kechik ◽  
Hussein Baqiah ◽  
Chen Soo Kien ◽  
Lim Kean Pah ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Ac Susceptibility ◽  
Sno2 Nanoparticles ◽  
Treatment Method ◽  
Composition Analysis ◽  
Superconducting Transition ◽  
Superconducting Properties ◽  
Bulk Superconductors ◽  
Diamagnetic Transition ◽  
Critical Temperature Tc

YBa2Cu3O7−δ (Y-123) bulk superconductors with the addition of (0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 wt.%) SnO2 nanoparticles were synthesised via a thermal treatment method. The influence of SnO2 addition on the superconducting properties by means of critical temperature, Tc, AC susceptibility, phase formation and microstructures, including its elemental composition analysis, were studied. Sharp superconducting transition, ∆Tc, and diamagnetic transition were obtained for all SnO2-added samples. It was observed that sample x = 0.4 with a Y-123 phase percentage of 95.8% gives the highest Tc, smallest ∆Tc, and the sharpest diamagnetic transition in the normalised susceptibility curves. The microstructure also showed an excess of Sn precipitates on the sample’s surface at x = 0.8 and above. As such, the best superconducting properties were observed at x = 0.4 SnO2 addition inside the Y-123 host sample.

scholarly journals Characterisation of the mechanical failure and fracture mechanisms of single grain Y–Ba–Cu–O bulk superconductors

2019 ◽  
Vol 33 (1) ◽  
pp. 015003 ◽  
Author(s):  
Jasmin V J Congreve ◽  
Yunhua Shi ◽  
Kai Yuan Huang ◽  
Anthony R Dennis ◽  
John H Durrell ◽  
...  
Keyword(s):  
Mechanical Failure ◽  
Fracture Mechanisms ◽  
Bulk Superconductors ◽  
Single Grain
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