Formation, characterization and magnetic properties of maghemite gamma-Fe2O3 nanoparticles in borate glasses

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1016/j.jallcom.2014.11.059

Ключевые слова: Nanostructures, Crystal structure and symmetry, Magnetic measurements, Crystal structure and symmetry, Magnetic measurements, Nanostructures, Crystal symmetry, Glass, Heat treatment, Lead, Magnetic properties, Magnetic resonance, Magnetic resonance spectroscopy, Magnetic variables measurement, Magnetization, Nanocomposites, Nanoparticles, Nanostructures, Samarium, Tapes, Temperature distribution, Transmission electron microscopy, Average size, Borate glass, Crystal structure and symmetry, Doping elements, Electron magnetic-resonance spectrum, Magnetic phase, Magnetization temperature, Ordered substance, Nanomagnetics

Аннотация: A new type of nanocomposite materials based on maghemite, gamma- Fe2O3, nanoparticles dispersed in borate glasses co-doped with low contents of iron together with the larger radius element combinations: Y and Bi, or Sm and Pb, or Y and Pb is studied. Nanoparticles arise as a result of heat treatment of the glasses which gives them properties characteristic of magnetically ordered substances. Transmission electron microscopy and XRD show that only one magnetic phase, namely gamma-Fe2O3 nanoparticles, occurs in glasses subjected to the thermal treatment at 540 degrees C during 24 h independently on the doping element nature. At the same time doping element and their concentrations ratio in every combination affect the particles average size and glass magnetic properties, such as magnetization temperature dependences, Faraday rotation value and electron magnetic resonance spectrum characteristics. (C) 2014 Elsevier B.V. All rights reserved.

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Издание

Журнал: JOURNAL OF ALLOYS AND COMPOUNDS

Выпуск журнала: Vol. 624

Номера страниц: 60-67

ISSN журнала: 09258388

Место издания: LAUSANNE

Издатель: ELSEVIER SCIENCE SA

Авторы

  • Edelman I.S. (L.V. Kirensky Institute of Physics, Siberian Branch of the RAS)
  • Ivanova O.S. (L.V. Kirensky Institute of Physics, Siberian Branch of the RAS)
  • Petrakovskaja E.A. (L.V. Kirensky Institute of Physics, Siberian Branch of the RAS)
  • Velikanov D.A. (Siberian Federal University)
  • Tarasov I.A. (L.V. Kirensky Institute of Physics, Siberian Branch of the RAS)
  • Zubavichus Y.V. (NRC Kurchatov Institute)
  • Trofimova N.N. (NRC Kurchatov Institute)
  • Zaikovskii V.I. (Novosibirsk State University)

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