Magnetic and magneto-optical properties of ion-synthesized cobalt nanoparticles in silicon oxide

Тип публикации: статья из журнала

Год издания: 2008

Идентификатор DOI: 10.1134/S1063783408110140

Ключевые слова: 75, 60, Ej, 78, 20, Ls, 61, 46, Df

Аннотация: The magnetic and magneto-optical properties of ion-synthesized cobalt nanoparticles in the amorphous silicon oxide matrix are investigated as a function of the implantation dose. The analysis of the field dependences of the magnetization and the magneto-optical Faraday and Kerr effects demonstrates that, as the ion implantation dose increases, the superparamagnetic behavior of an ensemble of cobalt nanoparticles at room temperature gives way to a ferromagnetic response with the anisotropy characteristic of a thin magnetic film. The magnetization curves for the superparamagnetic and ferromagnetic ensembles of cobalt nanoparticles are simulated to determine their average sizes and the filling density in the irradiated layer of the silicon dioxide matrix. It is revealed that the spectral dependences of the Faraday and Kerr effects for ion-synthesized cobalt nanoparticles differ substantially from those for continuous cobalt films due to the localized excitations of free electrons in the nanoparticles.

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Издание

Журнал: PHYSICS OF THE SOLID STATE

Выпуск журнала: Vol. 50, Is. 11

Номера страниц: 2088-2094

ISSN журнала: 10637834

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Edelman I.S. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia)
  • Vorotynova O.V. (Siberian Fed Univ, Inst Urban Construct Management & Reg Econ, Krasnoyarsk 660041, Russia)
  • Seredkin V.A. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia)
  • Zabluda V.N. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia)
  • Ivantsov R.D. (Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia)
  • Gatiyatova Yu. I. (Russian Acad Sci, Zavoisky Phys Tech Inst, Kazan 420029, Russia)
  • Valeev V.F. (Russian Acad Sci, Zavoisky Phys Tech Inst, Kazan 420029, Russia)
  • Khaibullin R.I. (Russian Acad Sci, Zavoisky Phys Tech Inst, Kazan 420029, Russia)
  • Stepanov A.L. (Russian Acad Sci, Zavoisky Phys Tech Inst, Kazan 420029, Russia; Laser Zentrum Hannover, D-30419 Hannover, Germany)

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