Dimensional effects in the properties of maghemite |
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| Authors: | M G Osmolovsky O M Osmolovskaya |
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| Institution: | 1. St. Petersburg State University, St. Petersburg, 198504, Russia
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| Abstract: | Single-phase γ-Fe2O3 powders with a coercivity of 161–263 Oe are obtained from iron(III) hydroxide by hydrothermal synthesis followed by heat treatment. Particle size distributions are plotted, based on the TEM data. Magnetic measurements show that a significant decrease in the squareness ratio and coercivity occurs at a mean particle volume of 60000 nm3. |
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