Crystal structure of the 80 K superconductor YBa2Cu4O8

Marsh, P.; Fleming, R. M.; Mandich, M. L.; DeSantolo, A.; Kwo, J.; Hong, M.; Martı́nez-Miranda, L. J.

doi:10.1038/334141a0

Cited by 327 publications

(41 citation statements)

References 13 publications

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“…The relative densities of the Y 1−x Sb x Ba 2 Cu 3 O y samples (as a percentage of the pure Y123 theoretical density of 6.357 g/cm 3 ) determined by the Archimedes water displacement method were 90.77% for x = 0.00, 88.09% for x = 0.05, 88.25% for x = 0.10, 91.87% for x = 0.15 and 92.65% for x = 0.20. The density and porosity results are listed in Table 1 and plotted with respect to Sb molar doping ratio (x) in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The densities of the System II samples were measured as 90.77%, 94.07%, 93.13%, 89.82%, and 88.88% of the theoretical density of Y123 (6.357 g/cm 3 ) for x = 0.00, 0.05, 0.10, 0.15, 0.20, respectively, and it is shown that there is not a linear relation between the density and the substitution level, from Fig. 13.…”

Section: Methodsmentioning

confidence: 99%

“…Y123 is the first material found to have a superconducting transition temperature above liquid nitrogen temperature. After this discovery, the Y-Ba-Cu-O family of compounds, like Y123, YBa 2 Cu 4 O 8 (Y124, T c = 80 K) and YBa 2 Cu 4 O 7 (Y247, T c = 40 K), have been intensively studied [2][3][4]. Meanwhile, numerous papers have been published on the effects of the addition of various elements into the Y123 structure for further improvement in T c , critical current, pinning, etc.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

Akyüz

Kocabaş

Yıldız

et al. 2011

J Supercond Nov Magn

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In this study, the effects of partial Sb 3+ ion substitutions for the Y sites and the Cu sites on the superconducting properties of YBa 2 Cu 3 O y (Y123) ceramic superconductors were investigated. The samples were prepared by the conventional solid-state reaction method and the properties of the samples were investigated by means of X-ray diffraction, AC magnetic susceptibility measurements, scanning electron microscope, and energy dispersive X-ray analysis. The critical temperatures were determined to be in the range of 80-92 K for both Systems I and II. It was found that Sb-addition leads to the formation of the non-superconducting YBa 2 SbO 6 phase, which has a negative effect on the critical temperature, since the highest critical temperature was measured for pure Y123. However, the increasing substitution level has a negligible effect on the X-ray diffraction analysis peak intensities of the superconducting phases. In addition, SEM images showed that Sb substitution decreases the grain size and modifies the microstructure development, which makes the samples denser.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

Akyüz

Kocabaş

Yıldız

et al. 2011

J Supercond Nov Magn

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“…The CuO 2 planes are found to be more favorable for superconductivity as compared to insulating charge reservoir block containing single or double Tl-O layers [110]. The superconducting properties like critical temperature, irreversibility field, critical current density and flux pinning in thallium-based compounds largely depend on the thickness of the insulating Tl-O layer and the strength of Josephson coupling between CuO 2 planes [23,49,50,53,[111][112][113][114][115]. The presence of the Tl-O layers between the CuO 2 superconducting blocks yields anisotropy in the physical properties of these compounds.…”

Section: Why Tl-1223 Superconductor Is Superiormentioning

confidence: 99%

A Search for a Low Anisotropic Superconductor

Khurram¹,

Khan²

2010

JEMAA

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“…One of these alloys is the YBCO superconductor that was discovered in 1987 [2]. Although YBCO superconductors with different phases have been produced [3][4][5][6], YBa 2 Cu 3 O 7 (Y123) is the phase to which the most attention was paid. The transition temperature of Y123 is about 92 K [7].…”

Section: Introductionmentioning

confidence: 99%

The effect of sintering in different atmospheres on superconductivity parameters of YBCO

Başoğlu¹

2017

Turk J Phys

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YBa 2 Cu 3 O 7 (Y123) is a superconductor material discovered in 1987 and its transition temperature is above the liquid nitrogen temperature. It is known that superconductor samples produced by the solid-state reaction route are very often sintered in air atmosphere. However, in the presented work, Y123 was prepared by the same technique using a sintering ambient composed of a mixture of oxygen and argon gases for the first time. Critical current densities of the samples were calculated using results of magnetization measurements. It was obtained from magnetization analysis that all the samples exhibited superconductor character. It was also observed that the sample sintered in the 50% oxygen and 50% argon atmosphere showed the highest critical current density.

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Crystal structure of the 80 K superconductor YBa2Cu4O8

Cited by 327 publications

References 13 publications

The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

The Effects of Sb Substitution on Structural Properties in YBa2Cu3O7 Superconductors

A Search for a Low Anisotropic Superconductor

The effect of sintering in different atmospheres on superconductivity parameters of YBCO

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