Ali E Aliev 2008 Supercond. Sci. Technol. 21 115022 doi:10.1088/0953-2048/21/11/115022
Ali E Aliev
Show affiliationsTungsten trioxide, WO3−y, infiltrated into various nanoporous matrix structures such as carbon inverse opal, carbon nanotube paper or platinum sponge, and then intercalated with alkaline ions (Li+, Na+) exhibits a pronounced diamagnetic onset in ZFC magnetization in a wide range of temperatures, 125–132 K. Resistivity measurements show nonzero jump and intensive fluctuations of electrical resistance below observed transition points. The observed magnetic and electrical anomalies in nanostructured tungsten bronzes (LixWO3−y and NaxWO3−y) suggest the possibility of localized non-percolated superconductivity.
74.78.Na Mesoscopic and nanoscale systems
74.62.Bf Effects of material synthesis, crystal structure, and chemical composition
74.40.+k Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)
81.20.Fw Sol-gel processing, precipitation
74.25.Fy Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
Issue 11 (November 2008)
Received 12 July 2008, in final form 3 September 2008
Published 1 October 2008
Ali E Aliev 2008 Supercond. Sci. Technol. 21 115022
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