Synthesis and investigation of precipitated ensembles of magnetic nanoparticles with controlled easy axis orientation |
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| Authors: | R R Gabbasov A Y Yurenya V M Cherepanov M A Polikarpov M A Chuev V Y Panchenko |
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| Institution: | 1.National Research Center Kurchatov Institute,Moscow,Russia;2.Department of Physics,Moscow State University,Moscow,Russia;3.Institute of Physics and Technology,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | Two samples with immobilized magnetic nanoparticles are synthesized and investigated. The first sample has randomly oriented easy axes of magnetic anisotropy; the second sample has preferentially aligned easy axes, produced via the precipitation of a colloid of ferromagnetic particles in the presence of a magnetic field. It is shown that the precipitation of an aqueous suspension of nanoparticles in the presence of a magnetic field greatly changes the anisotropy of a sample, compared to one prepared by precipitation without a magnetic field. The second sample exhibits a preferential direction of the easy axes of magnetic anisotropy that coincides with the direction of the external magnetic field applied in the drying process of sample preparation. |
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