Flux pinning of Bi2Sr2CaCu2O8+δ/Ag superconductors utilizing (Sr,Ca)14Cu24O41 defects and nanophase Al2O3 and Au particles

Haugan, Timothy J.; Wong‐Ng, W.; Cook, Lawrence P.; Brown, H. J.; Swartzendruber, L. J.; Shaw, D.T.

doi:10.1016/s0921-4534(00)00157-x

Cited by 22 publications

(12 citation statements)

References 9 publications

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“…The sub grain boundaries appeared in YBCO matrix are found to be efficient pinning centers. For bismuth based superconductors (BSCCO), the improvement of the ) H ( J c of Bi-2212 has been demonstrated by the presence of Al-containing phases imbedded in the superconducting matrix [3]. We have also studies systematically the effect of nanometer Al 2 O 3 addition on the (Bi,Pb)-2223 superconductor compounds.…”

Section: Introductionmentioning

confidence: 97%

“…However, their electrical transport properties drawback with increasing sample temperature and applied magnetic due to their low flux pinning energy. One of the possible solutions to enhance the flux pinning properties of HTc superconductors is by chemical doping and addition of nanosized particles [1][2][3][4]. Chemical dopants and preparation method play an important role on the microstructure and electrical properties of the superconducting material.…”

Section: Introductionmentioning

confidence: 99%

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Pinning mechanism in (Bi,Pb)-2223 polycrystalline samples prepared with Al₂O₃nano-particles

Ghattas¹,

Azzouz²,

Annabi³

et al. 2008

J. Phys.: Conf. Ser.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Pinning mechanism in (Bi,Pb)-2223 polycrystalline samples prepared with Al₂O₃nano-particles

Ghattas¹,

Azzouz²,

Annabi³

et al. 2008

J. Phys.: Conf. Ser.

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“…The thicker grain boundaries will add to the additional resistivity of the final compound. Recently, the addition of nano-oxides to the high-temperature superconductors plays an important role for enhancing the critical current density and flux pinning [8][9][10][11][12][13]. This enhancement is due to trapping of nano-oxide particles within the superconducting grains, introducing second phase defects [8].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Inter-grain Connectivity in Nano-particles Doped (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ Superconductors

Khan

Saleem

Hussain

2012

J Supercond Nov Magn

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Polycrystalline (Cu 0.5 Tl 0.5 )Ba 2 Ca 2 Cu 3 O 10−δ superconductors show strong composition variations at the termination ends of the crystals which compromise over-all superconducting properties of the final compound. These composition variations are one of the root causes of void formation which produces a poor quality material. The better inter-grain coupling suppresses the Josephson losses required for higher transport critical current density (J c ). The lower losses across the inter-grain Josephson junctions are essential for wire and microelectronic applications. We have fixed such inadvertent composition variation in (Cu 0.5 Tl 0.5 )Ba 2 Ca 2 Cu 3 O 10−δ superconductors by doping them with nano-particles of CuO, BaO and CaO 2 . Nanoparticles doped (Cu 0.5 Tl 0.5 )Ba 2 Ca 2 Cu 3 O 10−δ superconductors were synthesized at 860°C and characterized using Xray diffraction (XRD), resistivity (ρ), ac-susceptibility (χ), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) measurements. The magnitude of superconductivity is significantly enhanced with the doping of nano-particles. The samples with 15 wt. % addition of CuO nano-particles have even shown textured elongated crystalline with extremely low population of voids.

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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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Flux pinning of Bi2Sr2CaCu2O8+δ/Ag superconductors utilizing (Sr,Ca)14Cu24O41 defects and nanophase Al2O3 and Au particles

Cited by 22 publications

References 9 publications

Pinning mechanism in (Bi,Pb)-2223 polycrystalline samples prepared with Al₂O₃nano-particles

Pinning mechanism in (Bi,Pb)-2223 polycrystalline samples prepared with Al₂O₃nano-particles

Enhanced Inter-grain Connectivity in Nano-particles Doped (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ Superconductors

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

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Flux pinning of Bi2Sr2CaCu2O8+δ/Ag superconductors utilizing (Sr,Ca)14Cu24O41 defects and nanophase Al2O3 and Au particles

Cited by 22 publications

References 9 publications

Pinning mechanism in (Bi,Pb)-2223 polycrystalline samples prepared with Al2O3nano-particles

Pinning mechanism in (Bi,Pb)-2223 polycrystalline samples prepared with Al2O3nano-particles

Enhanced Inter-grain Connectivity in Nano-particles Doped (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ Superconductors

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

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Pinning mechanism in (Bi,Pb)-2223 polycrystalline samples prepared with Al₂O₃nano-particles

Pinning mechanism in (Bi,Pb)-2223 polycrystalline samples prepared with Al₂O₃nano-particles