Change in the magnetic properties of nanoferrihydrite with an increase in the volume of nanoparticles during low-temperature annealing

Описание

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1134/S1063783416090092

Аннотация: The results of the investigation into the effect of low-temperature annealing of a powder of nanoparticles of bacterial ferrihydrite on its magnetic properties have been presented. It has been found that an increase in the time (up to 240 h) and temperature (in the range from 150 to 200A degrees C) of annealing leads to a monotonicПоказать полностьюincrease in the superparamagnetic blocking temperature, the coercive force, and the threshold field of the opening of the magnetic hysteresis loop (at liquid-helium temperatures), as well as to an increase in the magnetic resonance line width at low temperatures and in the magnetic susceptibility at room temperature. At the same time, according to the results of the analysis of the Mossbauer spectra, the annealing of ferrihydrite does not lead to the formation of new iron oxide phases. Most of these features are well consistent with the fact that the low-temperature annealing of ferrihydrite causes an increase in the size of nanoparticles, which is confirmed by the results of transmission electron microscopy studies.

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Издание

Журнал: PHYSICS OF THE SOLID STATE

Выпуск журнала: Vol. 58, Is. 9

Номера страниц: 1782-1791

ISSN журнала: 10637834

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Balaev D.A. (Siberian Federal University)
  • Ladygina V.P. (International Scientific Centre for Organism Extreme States Research,Presidium of the Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences)
  • Krasikov A.A. (Siberian Federal University)
  • Stolyar S.V. (Siberian Federal University)
  • Iskhakov R.S. (Kirensky Institute of Physics,Siberian Branch of the Russian Academy of Sciences)
  • Bayukov O.A. (Kirensky Institute of Physics,Siberian Branch of the Russian Academy of Sciences)
  • Vorotynov A.M. (Kirensky Institute of Physics,Siberian Branch of the Russian Academy of Sciences)
  • Volochaev M.N. (Kirensky Institute of Physics,Siberian Branch of the Russian Academy of Sciences)
  • Dubrovskiy A.A. (International Laboratory of High Magnetic Fields and Low Temperatures)
  • Yaroslavtsev R.N. (Siberian Federal University)

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