Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2013

Идентификатор DOI: 10.1134/S0021364013160029

Аннотация: The magnetic properties of antiferromagnetic nanoparticles of FeOOH center dot nH(2)O with sizes of 3-7 nm, which are products of vital functions of Klebsiella oxytoca bacteria, have been studied. Particles exhibit a superparamagnetic behavior. The characteristic blocking temperature is 23 K. Analysis of the magnetization curves shows that the mechanism of the formation of the uncompensated magnetic moment of particles is the random decompensation of magnetic moments of Fe3+ ions both on the surface and in the bulk of the antiferromagnetic particle. In this mechanism, the exchange coupling between the uncompensated magnetic moment of the particle and its antiferromagnetic "core" is implemented. It has been found that the temperature dependence of the uncompensated magnetic moment has the form 1 - constT (2).

Журнал: JETP LETTERS

Выпуск журнала: Vol. 98, Is. 3

Номера страниц: 139-142

ISSN журнала: 00213640

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

• Balaev D.A. (Siberian Federal University)
• Dubrovskii A.A. (Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences)
• Stolyar S.V. (Siberian Federal University)
• Iskhakov R.S. (Siberian Federal University)
• Krasikov A.A. (Siberian Federal University)
• Khilazheva E.D. (Siberian Federal University)
• Ladygina V.P. (Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science)

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