Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2009

Идентификатор DOI: 10.1134/S1063785009100022

Ключевые слова: MAGNETIC-PROPERTIES, NANOSIZED COFE2O4, ANISOTROPY, POWDERS, CURVES

Аннотация: We have studied magnetic nanoparticles of cobalt ferrite obtained by the extraction-pyrolysis method in a mesoporous silicon dioxide (MSM-41) molecular sieve matrix. The X-ray diffraction data show evidence for the formation of CoFe2O4 particles with a coherent scattering domain size of ~40 nm. Measurements of the magnetization curves showed that powders consisting of these nanoparticles are magnetically hard materials with a coercive field of Hc(4.2 K) = 9.0 kOe and Hc(300 K) = 1. 8 kOe and a reduced remanent magnetization of Mr/Ms(4.2 K) = 0.83 and Mr/Ms(300 K) = 0.49. The shape of the low-temperature (4.2 K) magnetization curves is adequately described in terms of the Stoner-Wohlfarth model for randomly oriented single-domain particles with a cubic magnetic anisotropy. © Pleiades Publishing, Ltd., 2009.

Журнал: Technical Physics Letters

Выпуск журнала: Vol. 35, Is. 10

Номера страниц: 882-884

• Komogortsev S.V. (Siberian State Technological University)
• Patrusheva T.N. (Siberian State Technological University)
• Balaev D.A. (Siberian State Technological University)
• Denisova E.A. (Siberian State Technological University)
• Ponomarenko I.V. (Siberian State Technological University)

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