Crystal growth of Bi-based (85 K) high-Tc superconducting compounds with a mirror furnace

Menken, M.J.V.; Winkelman, A.J.M.; Menovsky, A.A.

doi:10.1016/0022-0248(91)90003-n

Cited by 36 publications

(19 citation statements)

References 6 publications

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“…Details of the preparation and characterisation are given elsewhere [20]. The polarised XAS measurements were performed on station 1.1 of the SRS at the Daresbury Laboratory, UK.…”

Section: Methodsmentioning

confidence: 99%

Electronic structure studies of the Bi2212 system by polarised X-ray absorption measurement

Saini¹,

Law²,

Pudney³

et al. 1995

Physica C: Superconductivity

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General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractPolarised X-ray absorption (XAS) measurements have been made on high-quality superconducting Bi2Sr2CaCu2Os+y (Bi2212) single crystals to investigate the microscopic electronic structure in the normal and superconducting state of the system. The Cu L 3 XAS results led us to conclude that either there are no holes of 3dzz symmetry, or if any, they are insignificant in number. On the other hand, the O K XAS results show the presence of a significant density of p~ symmetry orbitals for itinerant holes. An increase in the 3d9_L/3d 9 ratio estimated from the Cu L 3 XAS measurements was observed while going from the normal to the superconducting state of the system. The results are discussed in the light of the structural distortions taking place below T c.

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“…Details of the preparation and characterisation are given elsewhere [20]. The polarised XAS measurements were performed on station 1.1 of the SRS at the Daresbury Laboratory, UK.…”

Section: Methodsmentioning

confidence: 99%

Electronic structure studies of the Bi2212 system by polarised X-ray absorption measurement

Saini¹,

Law²,

Pudney³

et al. 1995

Physica C: Superconductivity

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“…In addition, the long axis of this ellipse indicates a larger range of bismuth distributions within the compound [20]. Comparing to crystal compositions of various reports [15][16][17][18][19], however, their compositional deviation spanned a wide range of approximately 10% particularly in the Bi content. This discrepancy was probably owing to measurements without calibrating by a compound standard.…”

Section: Characterization Of Bi-2 2 1 2 Single Crystalsmentioning

confidence: 89%

“…Recently for the consideration on applications, the focus has been on either increasing the Sr/Ca ratio or substitution of Fe [4], Co [5], Ni [6] and Li [7] at the Cu atomic sites within a Bi-2 2 1 2 crystal lattice in order to enhance T c of Bi-2 2 1 2 compounds. In contrast, the breakdown of the superconductivity was studied by decreasing T c through a decrease in the mole ratio of strontium divided by calcium (Sr/Ca), or through the doping of Y [4] or rare earth ions [8] into Ca atomic sites.…”

Section: Introductionmentioning

confidence: 99%

Crystal growth of Bi2(SrxCa3−x)Cu2Oy with traveling solvent floating zone method

Yeh

Huang

Gan

et al. 2004

Journal of Crystal Growth

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“…CaCu2O8± [1][2][3][4],La2~Sr~CuO4 [51and Nd2~ambient pressures. In this paper we report for the Ce~CuO4[5] compounds.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper we report for the Ce~CuO4[5] compounds. In our previous work first time on the growth of the Bi-2212 single we reported on the growth of the pure and Nicrystals by the TSFZ method at different oxygen substituted Bi-2212 superconducting phase [1]. ambient pressures up to 300 kPa.…”

Section: Introductionmentioning

confidence: 99%

Growth of Bi2Sr2CaCu2O8 + x single crystals at different oxygen ambient pressures

Kes

Hiền

et al. 1994

Journal of Crystal Growth

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Bi-2212 superconducting single crystals were grown by the travelling solvent floating zone method at different oxygen ambient pressures. Electron probe micro-analysis showed a systematic increase of the Sr/Ca ratio in the as-grown crystals with increasing oxygen ambient pressure and a maximal superconducting transition temperature of Tc~onset= 95 K, and ziT= 1.5 K was obtained for crystals grown at an oxygen ambient pressure of 200 kPa. Thermogravimetric and post-annealing experiments in air at 500 and 800°Chave shown that the oxygen content and the Tconset values in the crystal do not depend only on the annealing temperature, but also on its chemical composition. The in-field current density J~measured at 5 K on crystals grown at 200 kPa oxygen ambient pressure was considerably smaller than that of crystals grown in air.

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Crystal growth of Bi-based (85 K) high-Tc superconducting compounds with a mirror furnace

Cited by 36 publications

References 6 publications

Electronic structure studies of the Bi2212 system by polarised X-ray absorption measurement

Electronic structure studies of the Bi2212 system by polarised X-ray absorption measurement

Crystal growth of Bi2(SrxCa3−x)Cu2Oy with traveling solvent floating zone method

Growth of Bi2Sr2CaCu2O8 + x single crystals at different oxygen ambient pressures

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