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Synthesis, structure and superconducting properties of the (Hg0.65V0.35)Sr-2(Nd1-ySry)Cu2O6+delta system
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UNSPECIFIED (2003) Synthesis, structure and superconducting properties of the (Hg0.65V0.35)Sr-2(Nd1-ySry)Cu2O6+delta system. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 391 (2). pp. 160-168. doi:10.1016/S0921-4534(03)00889-X ISSN 0921-4534.
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Official URL: http://dx.doi.org/10.1016/S0921-4534(03)00889-X
Abstract
Near single-phase compositions in the (Hg0.65V0.35)Sr-2(Nd1-ySry)Cu2O6+delta system have been prepared in the narrow composition range 0.3 less than or equal to y less than or equal to 0.5, with a maximum T-c = 82 K observed for y = 0.5. The crystal structure of a phase with the refined composition (Hg0.60V0.40)Sr-2(Nd0.53Sr0.47)Cu2O6.94 was determined from a combination of V-51 solid state NMR and (X-ray and neutron) powder diffraction data. In this material, linear HgO22- units are partially substituted by 2 tetrahedral VO43- oxyanions, resulting in a significant distortion of the neighbouring CuO5 and SrO8+delta polyhedra. Annealing (Hg0.60V0.40)Sr-2(Nd0.53Sr0.47)Cu2O6.94 under flowing argon reduces T-c from 67 K in the as prepared material to 54 K in the annealed product; in contrast, annealing the as-prepared material under flowing oxygen does not change Tc significantly. (C) 2003 Elsevier B.V. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0921-4534 | ||||
Official Date: | 15 August 2003 | ||||
Dates: |
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Volume: | 391 | ||||
Number: | 2 | ||||
Number of Pages: | 9 | ||||
Page Range: | pp. 160-168 | ||||
DOI: | 10.1016/S0921-4534(03)00889-X | ||||
Publication Status: | Published |
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