Microstructure and Transport Properties of Bi-2212 Prepared by CO2 Laser Line Scanning

Lennikov, V. V.; Özkurt, Berdan; Angurel, L.A.; Sotelo, A.; Özçelık, Bekir; Fuente, G.F. de la

doi:10.1007/s10948-012-1934-1

Cited by 37 publications

(23 citation statements)

References 24 publications

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“…Since the discovery of Bi-based high-temperature superconductors [1], which are among the most promising materials for technological and industrial applications, many experimental studies have been performed [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] in order to improve their critical temperature (Tc), critical current density (Jc), and better understand the structural properties of the system. The BSCCO families can be described by the Bi 2 Sr 2 Ca n-1 Cu n O 2n+4+y general formula, where n=1, 2 and 3.…”

Section: Introductionmentioning

confidence: 99%

Improvement of superconducting properties in Na-doped BSCCO superconductor

Özçelık

Gürsul

Sotelo

et al. 2014

J Mater Sci: Mater Electron

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In this study, the effect of Na substitution on the structural, electrical and magnetic properties of Bi 2 Sr 2 Ca 1-x Na x Cu 2 O 8+y superconductor with x=0.0, 0.05, 0.075, 0.1, 0.15, and 0.2 has been investigated. The effects of partial replacement of Na for Ca have been investigated by electrical resistivity (ρ-T), scanning electron microscopy (SEM), X-ray diffraction (XRD), and magnetic characterizations. XRD results have shown that the Bi-(2212) phase is the major one independently of the Na-concentration. SEM results indicate that the microstructure of samples is improved with increasing of Na-contents. From the electrical resistivity measurements it has been found that Tc is slightly higher than 92 K for Na-concentrations up to 0.20. Moreover, this trend is maintained in the magnetic measurements where the hysteresis loops are increased with increasing Na-concentrations. The maximum calculated Jc, using Bean's model, is around 10*10 6 A/cm 2 at 10 K and ∼ 1000 Oe for the 0.075 Na doped samples.

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Section: Introductionmentioning

confidence: 99%

Improvement of superconducting properties in Na-doped BSCCO superconductor

Özçelık

Gürsul

Sotelo

et al. 2014

J Mater Sci: Mater Electron

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“…In early studies [14,16], it was observed that the BSCCO thin films produced by PLD have exhibited poor supercondu cting properties compared to alternative fabricatio n techniques. It has been recently reported, for example, that high T C and J C values may be obtained for these high-T C materials produced by continuous laser irradiation methods [40][41][42]. On the other hand, it was reported that a significant improvement in supercon ducting propertie s of the thin films could be obtained, deposited by PLD and applying a post-anneal ing heat treatment in an atmosph ere containing a mixture of argon and oxygen (Ar: 93, O 2 : 7) [9,13,15,17].…”

Section: Introductionmentioning

confidence: 99%

The effects of the post-annealing temperature on the growth mechanism of Bi2Sr2Ca1Cu2O8+ thin films produced on MgO (1 0 0) single crystal substrates by pulsed laser deposition (PLD)

Nane

Özçelık

Abukay

2013

Journal of Alloys and Compounds

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a b s t r a c tThe effects of post-annealing temperature were investigated on Bi 2 Sr 2 Ca 1 Cu 2 O 8+o thin films deposited on MgO (1 0 0) substrates by pulsed laser deposition (PLD). The structural and superconducting properties of the films have been determined by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), temperature depende nt resistivity (R-T), and DC magnetization measure ments. The films which were deposited at 600 °C were post-annealed in an atmosphere of a gas mixture of Ar (93%) and O 2 (7%), at temperature ranging between 800 and 880 °C. This resulted in films which exhibited a single phase of 2212 with a high crystallini ty (FWHM % 0.16°) and texturing along the c-axis, perpendicular to the plane of the substrate. An optimum temperature of 860 °C was found for the post-annealing thermal treatment. The critical temperature, T C , of the films was measure d as 82 K and the critical current density, J C , was calcu lated as 3 Â 10 7 A/cm 2 for the film annealed at 860 °C.

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“…This thick zone containing copper supports the occurrence of efficient melting and diffusion phenomena along the interface between the substrate and the Cu–SiO 2 coating layer. Such efficient diffusion can be accounted for by the existence of large temperature gradients through the depth of the induced melt where a Maragoni type convection and a vigorous liquid agitation before solidification through a vertical linear front are to be expected …”

Section: Resultsmentioning

confidence: 99%

Laser‐induced coloration of ceramic tiles covered with magnetron sputtered precursor layers

et al. 2018

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This paper reports a new methodology for the coloring of glazed ceramic tiles consisting of the near infrared pulsed laser processing of copper containing oxide coatings prepared by magnetron sputtering. As a second approach, the employ for the same purpose of a novel laser furnace technique is also described. Changing the laser parameters and using the laser furnace to treat the tiles at high temperature during irradiation has resulted in a wide color palette. The optical characterization of the modified tiles by UV‐Vis spectroscopy has been complemented with their microstructural and compositional analysis by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Time Of Flight Secondary Ion Mass Spectrometry (TOF‐SIMS). The chemical composition of the surface was obtained by X‐ray Photoemission Spectroscopy (XPS) and its structure determined by X?ray diffraction (XRD). The chemical resistance was characterized by several tests following the norm ISO 10545‐13. Color changes have been attributed to surface microstructural and chemical transformations that have been accounted for by simple models involving different ablation, melting, diffusion, and segregation/agglomeration phenomena depending on the laser treatments employed.

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Microstructure and Transport Properties of Bi-2212 Prepared by CO2 Laser Line Scanning

Cited by 37 publications

References 24 publications

Improvement of superconducting properties in Na-doped BSCCO superconductor

Improvement of superconducting properties in Na-doped BSCCO superconductor

The effects of the post-annealing temperature on the growth mechanism of Bi2Sr2Ca1Cu2O8+ thin films produced on MgO (1 0 0) single crystal substrates by pulsed laser deposition (PLD)

Laser‐induced coloration of ceramic tiles covered with magnetron sputtered precursor layers

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