Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1016/j.jallcom.2015.02.012

Ключевые слова: Thermite reactions, Reactive films, Ferromagnetic nanocomposite films, ZrO2, Chemical stability, Ferromagnetic materials, Ferromagnetism, Nanocomposites, Synthesis (chemical), Thin films, Zirconium, Zirconium alloys, Ferromagnetic nanocomposites, High magnetization, Initiation temperature, Partial transformation, Secondary reactions, Solid-state synthesis, Thermite reaction, ZrO₂, Nanocomposite films

Аннотация: Fe-ZrO2 ferromagnetic nanocomposite thin films are successfully synthesized using a thermite reaction between the Zr and Fe2O3 layers. The initial Zr/Fe2O3 bilayers were obtained by the deposition of Zr layers on alpha-Fe2O3 films at room temperature. The mixing at the Zr/Fe2O3 interface and synthesis of alpha-Fe and the amorphous ZrO2 phases start at a temperature above the initiation temperature T-in similar to 250 degrees C. Together with the formation of alpha-Fe, partial transformation from Fe2O3 to Fe3O4 occurs after annealing at 300 degrees C. The secondary reaction between Fe3O4 and Zr starts soon after the Fe2O3 is converted to the Fe3O4 phase. The crystallization of amorphous ZrO2 and the formation of the ZrO2 cubic/tetragonal phase occurs above 400 degrees C. After annealing at 500 degrees C the reaction products contain (110) textured alpha-Fe nanocrystals with a diameter of about 34 nm embedded in an insulating c-ZrO2 (or t-ZrO2) matrix. The synthesized Fe-ZrO2 nanocomposite films possess soft magnetic behavior, high magnetization and good chemical stability. (C) 2015 Elsevier B.V. All rights reserved.

Журнал: JOURNAL OF ALLOYS AND COMPOUNDS

Выпуск журнала: Vol. 636

Номера страниц: 223-228

ISSN журнала: 09258388

Место издания: LAUSANNE

Издатель: ELSEVIER SCIENCE SA

• Myagkov V.G. (Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch)
• Bykova L.E. (Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch)
• Bayukov O.A. (Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch)
• Zhigalov V.S. (Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch)
• Tambasov I.A. (Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch)
• Zharkov S.M. (Siberian Federal University)
• Matsynin A.A. (Siberian Federal University)
• Bondarenko G.N. (Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, Siberian Branch)

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