Artificial and self-assembled vortex-pinning centers in superconducting Ba(Fe1−xCox)2As2thin films as a route to obtaining very high critical-current densities

The influence of Sm addition on the microstructure and superconducting properties of Y-Ba-Cu-O (YBCO) bulk superconductors has been studied. Precursor powders YBa2Cu3O7-δ (Y-123), Y2O3 and CeO2 were enriched with different amounts of SmBa2Cu3Oy (Sm-123) or Sm2O3 powders with the aim to increase critical current density, Jc,by introducing additional pinning centers. YBCO bulk superconductors with SmBa2Cu3Oy (Y123-Sm) or Sm2O3 (Y123-SmO) powder addition were prepared by the optimized top seeded melt growth process in the form of single grains. Microstructure analysis revealed that Sm2O3 addition leads to a higher amount of smaller Y2BaCuO5 (Y-211) particles, what is related to high critical current densities (Jc ~ 7 x 104 A/cm2) of the YBCO samples with Sm2O3 addition in low magnetic fields. The effect of Sm addition in the form of SmBa2Cu3Oy as well as Sm2O3 powder on Y2BaCuO5 particle size, critical temperature, Tc, and critical current density, Jc, is reported.

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High critical-current density with less anisotropy in BaFe2(As,P)2 epitaxial thin films: Effect of intentionally grown c-axis vortex-pinning centers

Applied Physics Letters ◽

10.1063/1.4875956 ◽

2014 ◽

Vol 104 (18) ◽

pp. 182603 ◽

Cited By ~ 37

Author(s):

Hikaru Sato ◽

Hidenori Hiramatsu ◽

Toshio Kamiya ◽

Hideo Hosono

Keyword(s):

Thin Films ◽

Critical Current Density ◽

Critical Current ◽

Current Density ◽

Vortex Pinning ◽

Epitaxial Thin Films ◽

High Critical Current Density ◽

Pinning Centers

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Superconducting Interconnections in Future High Performance Systems

MRS Proceedings ◽

10.1557/proc-108-27 ◽

1987 ◽

Vol 108 ◽

Cited By ~ 6

Author(s):

R. C. Frye

Keyword(s):

Critical Current ◽

High Speed ◽

High Performance ◽

Electronic Systems ◽

Maximum Current Density ◽

Maximum Current ◽

High Performance Systems ◽

Current Densities ◽

Very High ◽

Scaling Rule

ABSTRACTNew, high temperature superconducting materials could eventually be used for interconnections in electronic systems. Such interconnections would undoubtedly cost more to implement than conventional ones, so the most likely applications would be for complex, high-speed systems that could benefit from the performance advantages of a resistance-free interconnecting medium. The problem with conventional conductors in these systems is that the resistance of wires increases quadratically as dimensions are scaled down. The most important advantage offered by superconductors is that they are not linked to this scaling rule. Their principal limitation is the maximum current density that they will support and this determines the range of applications for which they are superior to conventional conductors. An analysis will be presented which examines the relative advantages of superconductors for different critical current densities, wire dimensions and system sizes.If their critical current densities are adequate, and if they can statisfy a number of processing criteria, then superconductors could find useful applications in a number of high performance electronic systems. The most likely applications will be those demanding very high interconnection densities. Several of these systems will be discussed.

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