Effects of nanosize MgO additions to bulk Bi2.1Sr1.7CaCu2Ox

Wei, Wei; Schwartz, J.; Goretta, K. C.; Balachandràn, U.; Bhargava, Atit

doi:10.1016/s0921-4534(97)01889-3

Cited by 58 publications

(31 citation statements)

References 28 publications

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“…Extensive research work has been done to improve the superconducting and flux pinning properties of this system. It has been found that low angle grain boundaries, stacking faults, twin boundaries, impurity phases, precipitates, secondary phases, growth dislocation, point defects, oxygen vacancies, structural nonuniformities, and other objects of different dimensionality can act as pinning centers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The doping of impurities with size of the order of the coherence length or creation of nanosize defects in the system by adjusting the processing condition can create effective pinning centers.…”

Section: Introductionmentioning

confidence: 99%

Flux pinning properties of Yb substituted (Bi,Pb)-2212 superconductor

Biju

Sarun

Aloysius

et al. 2008

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Flux pinning properties of Yb substituted (Bi,Pb)-2212 superconductor

Biju

Sarun

Aloysius

et al. 2008

Journal of Alloys and Compounds

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“…Pb addition results in the creation of a superconducting solid solution of Bi 2 − x Pb x Sr 2 Ca 2 Cu 3 O 10 by partial substitution of Bi [10][11][12][13]. Recently, the effect of nano addition has been extensively studied to improve the superconducting properties and to enhance the pinning force for BSCCO using nanoelements, nano-oxides, and nano-compounds [14][15][16][17][18][19][20]. The critical current density (J c ) is a crucial parameter of hightemperature superconductor for a variety of possible applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Magnetic Properties of Bi1.7Pb0.3Sr2Ca2Cu3O10+δ Added with Nano Y

Oboudi

2016

J Supercond Nov Magn

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Bi 17 Pb 0.3 Sr 2 Ca 2 Cu 3 O 10+δ superconductor samples were synthesized by the conventional solid-state reaction method. To study the effects of the addition of yttrium nanoparticles to the superconducting system, nano Y 2 O 3 was introduced by small weight percentages (0.2, 0.4, 0.6, 0.8, and 1.0 wt%) in the first step of the synthesis process. Phase identification and microstructural characterization of the samples were investigated using X-ray diffraction and scanning electronic microscopy (SEM). Energydispersive X-ray spectroscopy (EDX) analysis was utilized to confirm the presence of the desired elements in the chemical composition of the samples. Moreover, DC electrical resistivity as a function of the temperature, critical current density (J c ), AC magnetic susceptibility, and DC magnetization measurements were carried to evaluate the relative performance of samples. XRD analysis showed that both (Bi,Pb)-2223 and Bi-2212 phases coexist in the samples having an orthorhombic crystal structure. Both the onset critical temperatures (T c ) (onset) and zero electrical resistivity critical temperatures (T c ) (R = 0) of the samples were determined from the DC electrical resistivity measurements. An improvement of the superconducting transition temperature of 3.0 % was obtained with increasing Y 2 O 3 nanoparticles to x = 1.0 wt%, while the critical current density is improved by 200 %. AC magnetic susceptibility measurement showed that the diamagnetic fraction and intergranular coupling of the x = 1.0 wt% sample are greater than those of the others. The variation of magnetization with temperature (M-T curve) of the samples was measured by cooling the sample in zero fields (ZFC) and an applied field of 10 Oe (FC). The results of AC magnetic susceptibility and DC magnetization measurements were in good agreement with DC electrical resistivity measurement.

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“…Nano-particle addition to the superconducting matrix has been found to be one of the most practical and effective technique for enhancing the flux pinning and critical current density [9][10][11][12][13][14][15]. Moreover, their influence on the oxygen content is still a novel topic.…”

Section: Introductionmentioning

confidence: 99%

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

Mohammed

Awad

Abou‐Aly

et al. 2012

J Supercond Nov Magn

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In this study, superconducting samples of type Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ added by SnO 2 and In 2 O 3 in nano-scale were prepared by a solid-state reaction technique. The concentrations of both SnO 2 and In 2 O 3 were 0.0, 0.1, 0.2, 0.4, 0.6 and 1.0 wt% of the sample's total mass. The prepared samples were characterized using X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) for phase analysis and microstructure examination. The elemental content of the prepared samples was determined using energy dispersive X-ray (EDX) and particle induced X-ray emission (PIXE). The results of elemental content, determined from EDX and PIXE, were compared and discussed. In addition, The oxygen content of these samples was obtained using non Rutherford backscattering spectroscopy (RBS) at 3 MeV proton beam. It was found that the Oxygen-content of (Cu 0.5 Tl 0.5 )-1223 phase was not affected by both SnO 2 and In 2 O 3 nano-oxides addition. The electrical resistivity of the prepared samples was measured by the conventional four-probe technique from room temperature down to the zero superconducting transition temperature (T 0 ). An increase in the superconducting transition temperature T c from 106 to 119 K was observed as x was varied from 0.0 to 0.6 wt% for (SnO 2 ) x Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ , followed by a systematic decrease with increasing nano-SnO 2 addition. On the other hand, the T c values for (In 2 O 3 ) x Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ show a small variation with x. Moreover, the variation rate of T c with x, for both nano-additions, was found to be directly proportional to the variation of the volume fraction of the prepared samples.

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Effects of nanosize MgO additions to bulk Bi2.1Sr1.7CaCu2Ox

Cited by 58 publications

References 28 publications

Flux pinning properties of Yb substituted (Bi,Pb)-2212 superconductor

Flux pinning properties of Yb substituted (Bi,Pb)-2212 superconductor

Synthesis and Magnetic Properties of Bi1.7Pb0.3Sr2Ca2Cu3O10+δ Added with Nano Y

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

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