Crystal structure and superconductivity of rubidium tungsten bronzes Rb{sub x}WO{sub 3} prepared by a hybrid microwave method
- School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450052 (China)
- National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Science, P.O. Box 603, Beijing 100080 (China)
The rubidium tungsten bronzes Rb{sub x}WO{sub 3} have been prepared from Rb{sub 2}CO{sub 3}, WO{sub 3} and W powders using hybrid microwave method. The single hexagonal phase samples can be obtained as actual rubidium content x in the range of 0.21-0.33, and their lattice parameters a and c linearly drop and rise with the increase of rubidium content respectively. For samples with x = 0.14, 0.16, 0.18, the superconducting transition temperature T{sub c} from resistivity measurements does not change with the rubidium content, while T{sub c} from susceptibility measurements shows a decrease from 5.3 K for x = 0.14 to 4.8 K for x = 0.18. The charge density wave (CDW) transition appears in Rb{sub 0.21}WO{sub 3}, Rb{sub 0.23}WO{sub 3} and Rb{sub 0.25}WO{sub 3} at about 200-260 K. The CDW transition is most obvious in Rb{sub 0.23}WO{sub 3} which shows the lowest degree of crystallization among the samples.
- OSTI ID:
- 21068231
- Journal Information:
- Materials Research Bulletin, Vol. 43, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2008.01.005; PII: S0025-5408(08)00007-X; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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