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Superconductivity in WO2.6F0.4 synthesized by reaction of WO3 with teflon

Author(s): Hirai, Daigorou; Climent-Pascual, Esteban; Cava, Robert Joseph

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Abstract: WO3-xFx (x ≤ 0.45) perovskite-like oxyfluorides were prepared by a chemically reducing fluorination route using the polymer polytetrafluoroethylene (teflon). The symmetry of the crystal structures of WO3-xFx changes from monoclinic to tetragonal to cubic as the fluorine content increases. Fluorine doping changes insulating WO 3 to a metallic conductor, and superconductivity (Tc = 0.4 K) was discovered in the samples with fluorine contents of 0.41 ≤ x ≤ 0.45. This easy fluorination method may be applicable to other systems and presents an opportunity for finding new oxyfluoride superconductors. © 2011 American Physical Society.
Publication Date: Nov-2011
Electronic Publication Date: 22-Nov-2011
Citation: Hirai, D., Climent-Pascual, E., Cava, R.J. (2011). Superconductivity in WO F synthesized by reaction of WO with teflon. Physical Review B, 84 (17), 10.1103/PhysRevB.84.174519
DOI: doi:10.1103/PhysRevB.84.174519
ISSN: 1098-0121
EISSN: 1550-235X
Pages: 84.17:174519-1 - 174519-6
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review B
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.
Notes: Physical Review B - Condensed Matter and Materials Physics. Volume 84, Issue 17, 22 November 2011, Article number 174519.

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