Journal ArticleDOI
Microstructure and Transport Properties of Bi-2212 Prepared by CO2 Laser Line Scanning
TLDR
In this paper, a laser line scanning method was applied to process rectangular cross-section Bi-2212 monoliths containing 2.9 % Ag using a CO2 laser.Abstract:
A novel Laser Line Scanning method has been applied to process rectangular cross-section Bi-2212 monoliths containing 2.9 % Ag using a CO2 Laser. Although previous work has suggested the use of nIR lasers (≈0.8–1.1 μm) for melt-processing metal oxide superconductors, the results obtained here demonstrate that mid-IR radiation from a CO2 laser (10.6 μm) may be just as convenient for such a purpose while it enables processing large surface areas. The samples described here were processed at traverse rates ranging between 15 and 60 mm/h, exhibited a complex textured microstructure and yielded highest Ic values of 71 A at 77 K.read more
Citations
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The effect of K-na co-doping on the formation and particle size of Bi-2212 phase
TL;DR: In this paper, the critical current densities as a function of magnetic field have been calculated from M-H hysteresis loops of samples according to Bean's critical model, indicating that K-Na co-doping cause higher Jc values than the pure ones.
Journal ArticleDOI
Improvement of superconducting properties in Na-doped BSCCO superconductor
TL;DR: In this article, the effect of Na substitution on the structural, electrical and magnetic properties of Bi2Sr2Ca1−xNaxCu2O8+y superconductor with x = 0.2 has been investigated.
Journal ArticleDOI
Effects of laser-induced periodic surface structures on the superconducting properties of Niobium
A. Cubero,Elena Martínez,Luis A. Angurel,G.F. de la Fuente,Rafael Navarro,Herbert Legall,J. Krüger,Jörn Bonse +7 more
TL;DR: In this article, the authors compared the properties of Niobium surfaces irradiated with 30-fs n-IR and 300-ps UV pulsed lasers with a pulse duration of 300ps and showed that these laser treatments are able to modify the superconducting properties of niobium samples.
Journal ArticleDOI
Effect of Yttrium substitution on superconductivity in Bi-2212 textured rods prepared by a LFZ technique
TL;DR: In this paper, the physical and superconducting properties of textured rods prepared by a laser floating zone (LFZ) technique have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX), dc-magnetization, magnetic hysteresis and critical current density calculation by using the Bean's critical state model.
Journal ArticleDOI
Structure, magnetic, photocatalytic and blood compatibility studies of nickel nanoferrites prepared by laser ablation technique in distilled water
S. Özçelik,Bestenur Yalcin,Lutfi Arda,H. Santos,Regino Sáez-Puche,Luis A. Angurel,G.F. de la Fuente,Bekir Özçelik +7 more
TL;DR: In this article, the structural features, magnetic behavior, photocatalytic properties and blood compatibility of NiFe2O4 nanoparticles (NPs) obtained by subnanosecond laser ablation in water were investigated.
References
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Journal ArticleDOI
ZrO2–Al2O3 eutectic plates produced by laser zone melting
TL;DR: In this paper, the authors describe a procedure for preparing large surfaces of eutectic composites directionally solidified from the melt, with very fine and uniform microstructures.
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Superconducting Bi-Ca-Sr-Cu-O Fibers Grown by the Laser-Heated Pedestal Growth Method
TL;DR: Superconducting fibers of several compositions including the nominal composition Bi2CaSrCu2O8 have been grown by means of the laser-heated pedestal growth method, providing the ideal condition for conduction along the copper-oxygen planes.
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Wavelength dependance in laser floating zone processing. A case study with bi‐SR‐CA‐CU‐O superconductors
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Ag distribution in thick Bi-2212 floating zone textured rods
TL;DR: In this paper, a floating zone melting method (LFZ) induced by a continuous CO 2 laser was used to fabricate long textured cylindrical bars through a solgel method.
Journal ArticleDOI
The influence of Pb and Ag doping on the Jc(H,T) dependence and the mechanical properties of Bi-2212 textured rods
TL;DR: In this article, the electrical, magnetic, and mechanical properties of the resulting rods after annealing were characterized, and they showed that Pb doping results in the decrease of the transport critical current density, Jc,t (from 4.4 × 107 to 6 × 106 ǫm−2 at 65 K and self-field) as well as in the worsening of the mechanical properties, by about 35% compared to the undoped samples.