Magnetic Properties of Iron Oxide Nanoparticles Obtained by Laser Evaporation


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Abstract

The paper concentrates on a synthesis of spherical magnetic particles obtained by laser evaporation under various process conditions. Depending on the process conditions, which include the pressure in a process chamber, laser pulse duration, mean laser power, and the type of power gas, the stoichiometry of the material ranges from Fe2.70O4 to Fe2.84O4, while the average diameter of nanoparticles ranges between 10–23 nm. The nanoparticles have an inverse spinel structure. In terms of the magnetic properties, the samples are a superparamagnetic ensemble. The spherical shape of the majority of nanoparticles as well as the existence of merely one magnetic phase are verified by the characteristics of microwave absorption. A relatively high saturation magnetization and a narrow size distribution of small nanoparticles obtained at 700 mmHg working pressure, 100 ms pulse duration, and 200 W laser power allow the authors to consider these conditions to be the most optimum for the nanopowder synthesis and recommend them for biological applications.

About the authors

Iu. P. Novoselova

Ural Federal University

Author for correspondence.
Email: novoselovajp@gmail.com
Russian Federation, Ekaterinburg

O. M. Samatov

Institute of Electrophysics of the Ural Division of the Russian Academy of Sciences

Email: novoselovajp@gmail.com
Russian Federation, Ekaterinburg

G. S. Kupriyanova

Immanuel Kant Baltic Federal University

Email: novoselovajp@gmail.com
Russian Federation, Kaliningrad

A. M. Murzakaev

Ural Federal University; Institute of Electrophysics of the Ural Division of the Russian Academy of Sciences

Email: novoselovajp@gmail.com
Russian Federation, Ekaterinburg; Ekaterinburg

A. P. Safronov

Ural Federal University; Institute of Electrophysics of the Ural Division of the Russian Academy of Sciences

Email: novoselovajp@gmail.com
Russian Federation, Ekaterinburg; Ekaterinburg

G. V. Kurlyandskaya

Ural Federal University

Email: novoselovajp@gmail.com
Russian Federation, Ekaterinburg

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