Superconducting property in tungsten containing amorphous carbon composite

Hiroyuki Miki, Takanori Takeno, Toshiyuki Takagi, Alexei Bozhko, Mikhail Shupegin, Hideya Onodera

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Superconductivity in tungsten-containing carbon-oxide film was reported. The film with 500 nm thickness was deposited onto polycrystalline silicon-oxides using chemical vapor deposition and co-sputtering of tungsten metal target. The structure of the film was investigated by Raman spectroscopy and X-ray diffraction measurements and the results indicated that the structure of the film is amorphous. The temperature dependence on resistivity was measured in the temperature range of 2-300 K. At the temperature of around 4.2 K resistive superconducting transition was observed. In order that the tungsten oxide and tungsten carbide with which superconductive transition temperature is different formed the finite cluster group, it can be understand by percolation theory that the superconducting phase of the total system appears. The diamagnetism was observed below 3.8 K, which is consistent with resistive superconducting transition.

Original languageEnglish
Title of host publicationNanoSingapore 2006
Subtitle of host publicationIEEE Conference on Emerging Technologies - Nanoelectronics - Proceedings
Pages278-282
Number of pages5
DOIs
Publication statusPublished - 2006
Event2006 IEEE Conference on Emerging Technologies - Nanoelectronics - Singapore, Singapore
Duration: 2006 Jan 102006 Jan 13

Publication series

NameNanoSingapore 2006: IEEE Conference on Emerging Technologies - Nanoelectronics - Proceedings
Volume2006

Other

Other2006 IEEE Conference on Emerging Technologies - Nanoelectronics
CountrySingapore
CitySingapore
Period06/1/1006/1/13

ASJC Scopus subject areas

  • Engineering(all)

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