Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1016/j.carbon.2015.04.086

Ключевые слова: Electronic structure, Magnetic materials, Magnetic properties, Magnetic variables measurement, Magnetism, Metals, Oxidation, X ray photoelectron spectroscopy, Ferromagnetic properties, Few layers graphene, Full oxidation, Hydrogen reduction, Long exposures, Measurements of, Metal surfaces, Spintronics device, Graphene

Аннотация: The results of measurements of XPS spectra and magnetic properties of powder graphene/Co composite prepared by hydrogen reduction of CoCl<inf>2</inf>·6H<inf>2</inf>O deposited on few-layers graphene matrix are presented. XPS Co 2p measurements show two sets of 2p<inf>3/2,1/2</inf>-lines belonging to oxidized and metallic Co-atoms. This means that metal in composite is partly oxidized. This conclusion is confirmed by magnetic measurements which show the presence of the main (from the metal) and shifted (from the oxide) hysteresis loops. The presence of oxide layer on the metal surface prevents the metal from the full oxidation and (as shown by magnetic measurements) provides the preservation of ferromagnetic properties after long exposure in ambient air which enables the use of graphene/metal composites in spintronics devices. © 2015 Elsevier Ltd. All rights reserved.

Журнал: Carbon

Выпуск журнала: Vol. 91

Номера страниц: 298-303

• Zhidkov I.S. (Institute of Metal Physics, Russian Academy of Sciences-Ural, S. Kovalevskoi 18 Str., Yekaterinburg, Russian Federation, Ural Federal University, 19 Mira Str., Yekaterinburg, Russian Federation)
• Skorikov N.A. (Institute of Metal Physics, Russian Academy of Sciences-Ural, S. Kovalevskoi 18 Str., Yekaterinburg, Russian Federation)
• Korolev A.V. (Institute of Metal Physics, Russian Academy of Sciences-Ural, S. Kovalevskoi 18 Str., Yekaterinburg, Russian Federation)
• Kukharenko A.I. (Institute of Metal Physics, Russian Academy of Sciences-Ural, S. Kovalevskoi 18 Str., Yekaterinburg, Russian Federation, Ural Federal University, 19 Mira Str., Yekaterinburg, Russian Federation)
• Kurmaev E.Z. (Institute of Metal Physics, Russian Academy of Sciences-Ural, S. Kovalevskoi 18 Str., Yekaterinburg, Russian Federation, Ural Federal University, 19 Mira Str., Yekaterinburg, Russian Federation)
• Fedorov V.E. (Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, Acad. Lavrentiev Prospect, 3, Novosibirsk, Russian Federation)
• Cholakh S.O. (Ural Federal University, 19 Mira Str., Yekaterinburg, Russian Federation)

• Scopus