High-Tc superconducting phases in the series Bi2.1(Ca, Sr)n+lCunO2n+4+δ

Tallon, J. L.; Buckley, R. G.; Gilberd, P.W.; Presland, M.R.; Brown, I. W. M.; Bowden, Mark E.; Christian, L.A.; Goguel, Reiner

doi:10.1038/333153a0

Cited by 292 publications

(53 citation statements)

References 5 publications

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“…The n value indicates the number of CuO 2 layers in the crystal structure, producing the Bi-2201, 2212 and 2223 phases with around 20, 85, and 110 K critical temperatures, respectively [19][20][21]. Among these phases, the Bi-2212 is stable in a wide range of compositions and processing temperatures but its Tc is influenced by the chemical composition.…”

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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“…Resistivity, susceptibility and magnetization experimental measurements in the Bi2223 compound (n = 3) show a transition to the superconducting state at ∼ 110 K [1,2]. In despite of the fact that this compound has a very high viability for its use in industrial and technological applications [3,4,5], we found surprisingly few theoretical reports.…”

Section: Introductionmentioning

confidence: 61%

Effects of Pb doping on structural and electronic properties of Bi2Sr2Ca2Cu3O10

Camargo-Martínez

Baquero

2016

Physica C: Superconductivity and its Applications

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Pb doping effect in the Bi2Sr2Ca2Cu3O10 compound (Bi2223) on the structural and electronic properties were investigated, using the Local Density (LDA) and Virtual Crystal (VCA) approximations within the framework of the Density Functional Theory (DFT), taking as reference the procedure implemented by H.Lin et al. in the Bi2212 compound [Phys. Rev. Lett. 96 (2006) 097001]. Results show that, the incorporation of Pb-dopant in Bi2223 lead a rigid displacement of the Bi/Pb-O bands toward higher energies, with a null contribution at the Fermi level, around the high symmetry point M in the irreducible Brillouin zone, for Pb doping concentration equal to or more than 26%, avoiding the presence of the so-called Bi-O pockets in the Fermi surface, in good agreement with angle-resolved photoemission spectroscopy (ARPES) and nuclear magnetic resonance (NMR) experiments, although a slight metallic character of the Bi-O bonds is still observed which would disagree with some experimental reports. The calculations show that the changes on the structural properties are associated to the presence or absence of the Bi-O pockets in the Fermi surface.

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“…All the unit cells belong to the tetragonal system. The crystal structures of the Bi series, BiESraCan_ l CunOEn + 4, with n = 1, 2 and 3, are very similar to those of the analogous T1 series, although some distortions impose a loss of the tetragonal symmetry (Tallon et al, 1988;von Schnering, Walz, Schwarz, Becker, Hartweg, Popp, Hettich, Mfiller & Kfimpf, 1988).…”

Section: T1-and Bi-containing Superconductorsmentioning

confidence: 91%

“…In fact, the well known l:2:3-superconductors, i.e. MBa2Cu307-x where M = yttrium or lanthanide ions, have been shown to have T/s in the range 80-95 K (Wu, Ashburn, Torng, Hor, Meng, Gao, Huang, Wang & Chu, 1987) and, more recently, Bi and T1 cuprates have been prepared with a T~ up to 125 K, the highest value so far reported (Haldar, Chen, Maheswaran, Roig-Janicki, Jaggi, Markiewicz & Giessen, 1988, and references therein; Tallon, Buckley, Gilberd, Presland, Brown, Bowden, Christian & Goguel, 1988, and references therein).…”

Section: Introductionmentioning

confidence: 93%

A unified description of the crystal structures of copper-containing ceramic superconductors

Nardin¹,

Randaccio²,

Zangrando³

1989

Acta Crystallogr Sect B

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A simple method for describing the crystal structures of Cu-containing ceramic superconductors is reported. This provides an easy way to build up their crystal structures by joining, according to simple rules, a few small building blocks related to the perovskite unit. The crystal structures of the ceramic superconductors so far reported are described in detail using this method, which can also be applied to other kinds of mixed Cu oxides. The unified description allows the relationships between all these structures to be rationalized, and similarities and differences to be pointed out.

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High-Tc superconducting phases in the series Bi2.1(Ca, Sr)n+lCunO2n+4+δ

Cited by 292 publications

References 5 publications

Improvement of superconducting properties in Na-doped BSCCO superconductor

Improvement of superconducting properties in Na-doped BSCCO superconductor

Effects of Pb doping on structural and electronic properties of Bi2Sr2Ca2Cu3O10

A unified description of the crystal structures of copper-containing ceramic superconductors

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