The Dependence of the Lattice Parameters on Oxygen Content in Orthorhombic YBa2Cu3O6+x: A High Precision Reinvestigation of Near Equilibrium Samples

Krüger, Christian; Conder, K.; Schwer, H.; Kaldis, E.

doi:10.1006/jssc.1997.7579

Cited by 38 publications

(12 citation statements)

References 22 publications

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“…Table 1 summarizes the cell parameter values determined on three straight and three curved YBCO whiskers collected from the same synthesis batch. The reported values agree with previously published cell parameters obtained for bulk YBCO samples, which are normally in the range 3.815-3.835 Å for the a-axis, 3.865-3.888 Å for the b-axis, and 11.68-11.74 Å for the c-axis [29][30][31][32]. To the best of our knowledge, no evaluation of the a, b and c lattice parameters has ever been performed for YBCO whiskers, except for the above-mentioned crystals obtained as a secondary product of the sputtering technique [13].…”

Section: Resultssupporting

confidence: 90%

Insight into non-linearly shaped superconducting whiskers via a synchrotron nanoprobe

Cagliero¹,

Borfecchia²,

Mino³

et al. 2012

Supercond. Sci. Technol.

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We were successful in synthesizing non-linear YBa 2 Cu 3 Ox whiskers, i.e. half loops or kinked shapes, which are promising candidates for solid-state devices based on the intrinsic Josephson effect and with improved electrical connections. We report on a complete characterization of their structural properties via a synchrotron nanoprobe as well as laboratory single-crystal diffraction techniques. This investigation allowed us to fully disclose the growth mechanism, which leads to the formation of curved whiskers. The superconducting properties are evaluated in comparison with their straight counterpart, revealing a strong functional analogy and confirming their potential applicability in superconducting electronic devices.

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Section: Resultssupporting

confidence: 90%

Insight into non-linearly shaped superconducting whiskers via a synchrotron nanoprobe

Cagliero¹,

Borfecchia²,

Mino³

et al. 2012

Supercond. Sci. Technol.

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“…b/a = 1.015 in unstressed YBa 2 Cu 3 O 6.67 [22], and for all three samples T c initially increases when b − a is decreased. This is in agreement with thermal expansion data showing a reduction in b − a below T c in unstressed samples [23].…”

mentioning

confidence: 83%

Suppression of superconductivity by charge density wave order in YBa$_2$Cu$_3$O$_{6.67}$

Barber,

Kim,

Loew

et al. 2021

Preprint

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Hole-doped cuprate superconductors show a ubiquitous tendency towards charge order. Although onset of superconductivity is known to suppress charge order, there has not so far been a decisive demonstration of the reverse process, namely, the effect of charge order on superconductivity. To gain such information, we report here the dependence of the critical temperature Tc of YBa2Cu3O6.67 on in-plane uniaxial stress up to 2 GPa. At a compression of about 1 GPa along the a axis, 3Dcorrelated charge density wave (3D CDW) order appears. We find that Tc decreases steeply as the applied stress crosses 1 GPa, showing that the appearance of 3D CDW order strongly suppresses superconductivity. Through the elastocaloric effect we resolve the heat capacity anomaly at Tc, and find that it does not change drastically as the 3D CDW onsets, which shows that the condensation energy of the 3D CDW is considerably less than that of the superconductivity.

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“…As reported in our previous paper [13], Al does not form any secondary phase with Y, Ba, Cu or Ce. The actual oxygen content in YBCO superconductors can be rapidly and simply found through the relationship between the oxygen content and the c-axis parameter of the crystal lattice, which is calculated from x-ray measurements [32]. But in our case this method could contain some mistakes due to the presence of Y211 particles and the possible influence of the Al atoms on the value of the c-axis parameter.…”

Section: Variation Of Lattice Parameters Of the Samples After So And mentioning

confidence: 96%

The influence of annealing in flowing argon on the microstructural and superconducting properties of Al doped YBCO bulks

Antal¹,

Zmorayová²,

Kováč³

et al. 2010

Supercond. Sci. Technol.

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The superconducting properties of YBa 2 (Cu 1−x Al x) 3 O 7−δ /Y 2 BaCuO 5 bulk superconductors with Al concentrations x = 0.0025, 0.005, 0.02 and 0.05 were studied. The influence of annealing in flowing oxygen (SO) and argon at 800 • C with subsequent oxygenation at 400 • C on the superconducting and microstructural properties was investigated. The clearest peak effect at 77 K was observed at the lowest Al concentration (x = 0.0025) for SO and at the highest Al concentration (x = 0.05) for annealing in argon. No decrease of the transition temperature, T c , with increasing Al concentration was observed for Al doped samples annealed in argon up to x = 0.02 in contrast to Al doped samples after standard oxygenation, where T c decreases continuously with Al concentration. The twin structures and the unit-cell lattice parameters of the crystals were investigated by optical microscopy and by x-ray diffraction. The results indicate the possibility of clustering of the Al atoms during annealing in flowing argon at 800 • C.

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The Dependence of the Lattice Parameters on Oxygen Content in Orthorhombic YBa2Cu3O6+x: A High Precision Reinvestigation of Near Equilibrium Samples

Cited by 38 publications

References 22 publications

Insight into non-linearly shaped superconducting whiskers via a synchrotron nanoprobe

Insight into non-linearly shaped superconducting whiskers via a synchrotron nanoprobe

Suppression of superconductivity by charge density wave order in YBa$_2$Cu$_3$O$_{6.67}$

The influence of annealing in flowing argon on the microstructural and superconducting properties of Al doped YBCO bulks

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