Highly enhanced superconducting properties of Eu-doped (Bi,Pb)-2212

Sarun, P.M.; Vinu, S.; Shabna, R.; Biju, A.; Syamaprasad, U.

doi:10.1016/j.matlet.2008.01.026

Cited by 46 publications

(30 citation statements)

References 18 publications

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“…The variation of lattice parameters a and c with Cr content in Bi 1.6 Pb 0.5 Sr 2 Pr x Ca 1.1 Cu 2.1 O y is depicted in Table 1. As seen from the table, the lattice constant, a, increases [29][30][31][32] while the lattice constant, c, decreases with the increase [27,[33][34][35] in the Cr addition. According to these results, the Bi-2212 phase decreases while the Bi-2201 phase starts to increase with the increase of the Cr addition; nevertheless, Fig.…”

Section: Xrd Analysesmentioning

confidence: 84%

Investigation of Structural and Superconducting Properties of Cr Added Bi-2212 Superconducting Ceramics

Yıldırım

Yücel

Bal

et al. 2011

J Supercond Nov Magn

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This study reports the effect of Cr addition on the structural and superconducting properties of Bi 1.8 Sr 2.0 Crx Ca 1.1 Cu 2.1 O y superconductor with x = 0, 0.1, 0.3, 0.5 0.7, and 1 by means of X-ray analysis (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and resistivity measurements. The samples studied in this work were prepared using the standard solid-state reaction method. Zero resistivity transition temperatures (T c ) are qualitatively estimated from the dc resistivity measurements. The zero resistivity transition temperatures are obtained to decrease from 81 K to 53 K with the increase in Cr addition. Moreover, the phase and lattice parameters were determined from XRD measurements. Based on the refinement of cell parameters done by considering the structural modulation, the Cr addition was confirmed by an increase of the lattice parameter a and decrease of the cell parameter a of the samples in comparison with that of the undoped sample (Cr0). As for the microstructure and element composition analyses on the surface of the samples produced, SEM and EDS measurements were investigated. According to the measurements, not only were the grain sizes of the samples noted to decrease, but also the surface morphology and grain connectivity were obtained to degrade with increase in the

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Section: Xrd Analysesmentioning

confidence: 84%

Investigation of Structural and Superconducting Properties of Cr Added Bi-2212 Superconducting Ceramics

Yıldırım

Yücel

Bal

et al. 2011

J Supercond Nov Magn

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“…One can see from the table, the percentage of (Bi, Pb)-2223 phase decreases and that of (Bi, Pb)-2212 phase increases with the Mn addition. Additionally, a systematic expansion in the a-axis length is observed [38][39][40][41] while a regular contraction in the c-axis length is obtained with the increase [42][43][44][45] in the Mn addition. It is well known that the lattice parameter a is controlled by the length of in-plane Cu-O bond [46].…”

Section: Xrd Analysesmentioning

confidence: 81%

Effect of Mn Addition on Structural and Superconducting Properties of (Bi, Pb)-2223 Superconducting Ceramics

Yıldırım

Bal

Yücel

et al. 2011

J Supercond Nov Magn

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This study deals with the effect of Mn addition on the structural and superconducting properties of Bi 1.8 Pb 0.4 Sr 2 Mn x Ca 2.2 Cu 3.0 O y ceramics with x = 0, 0.03, 0.06, 0.15, 0.3 and 0.6 by means of X-ray analysis (XRD), scanning electron microscopy (SEM), electron dispersive X-ray (EDX), resistivity, and transport critical current density (J c ) measurements. Zero-resistivity transition temperatures (T c ) of the samples produced via the standard solidstate reaction method are estimated from the dc resistivity measurements. Moreover, the phase fraction and lattice parameters are determined from XRD measurements while the microstructure, surface morphology and element composition analyses of the samples are investigated by SEM and EDX measurements, respectively. It is found that T c values are obtained to decrease from 109 K to 85 K; likewise, J c values are observed to reduce from 3200 A/cm 2 to 125 A/cm 2 with increasing Mn addition. According to the refinement of cell parameters done by considering the structural modulation, the Mn addition is confirmed by both an increase of the lattice parameter a and a decrease of the cell parameter c of the samples in comparison with that of the pure sample (Mn0). SEM measurements show that not only the surface morphology and grain connectivity are seen to degrade but the grain sizes of the samples are found to decrease with the increase of the Mn addition as well. The EDX results reveal that the elements used for the prepara-

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“…The selective substitution studies are essential and interesting for superconductivity research area in order to improve the critical current density. Elemental substitution is one of the important roles to enhance the T c and J c by improving the phase formation or microstructure of the system [10,11]. Practical applications, in terms of the BSCCO mechanical properties were also important for the studies since high temperature superconductors are generally restricted due to their brittleness in nature.…”

Section: -2506mentioning

confidence: 99%

THE EFFECTS OF FE-DOPING ON MECHANICAL PROPERTIES IN Bi1.6Pb0.4Sr2Ca2Cu3-XFeXOY SUPERCONDUCTOR

2018

MJAS

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Bi-2223 superconductors doped with Fe 2 O 3 at Cu-site were prepared in bulk form using high purity oxide powders via solid state reaction technique with intermediate grinding. The series of Fe stoichiometric ratio (x = 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10) are systematically added to Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3-x Fe x O y system to study the effect of Fe doping on mechanical and superconducting system properties. Vickers hardness, electrical resistivity, X-ray diffraction and Field Emission Scanning Electron Microscopy have been carried out to assess the effects of Fe doping. These measurements indicate that the Fe doping decreased the critical temperature and deteriorated formation of high T c phase, compared to undoped sample. Grain size of the samples were also reduced by increasing the amount of Fe and the mechanical properties were found to be escalate with the increasing of Fe concentration.

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Highly enhanced superconducting properties of Eu-doped (Bi,Pb)-2212

Cited by 46 publications

References 18 publications

Investigation of Structural and Superconducting Properties of Cr Added Bi-2212 Superconducting Ceramics

Investigation of Structural and Superconducting Properties of Cr Added Bi-2212 Superconducting Ceramics

Effect of Mn Addition on Structural and Superconducting Properties of (Bi, Pb)-2223 Superconducting Ceramics

THE EFFECTS OF FE-DOPING ON MECHANICAL PROPERTIES IN Bi1.6Pb0.4Sr2Ca2Cu3-XFeXOY SUPERCONDUCTOR

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