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Chemical Synthesis of Sub-micrometer- to Nanometer-Sized Magnetic FeCo Dice


  • This work was supported by Grant-in-Aid for Basic Research #(A) 17201021 and #(S) 14103016 from the Ministry of Education, Science, Culture and Sport of Japan, and Grant-in-Aid # 0171078-A from the Iketani Science and Technology Foundation. We thank Dr. M. Doi and Prof. Y. Shimada, Tohoku University, for Mössbauer and high frequency measurements and Prof. A. Narayanasamy, University of Madras, for useful discussion and suggestions during the preparation of this manuscript. Supporting Information is available online from Wiley InterScience or from the author.


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A modified polyol process for the synthesis of cubic-shaped FeCo particles at 403 K is demonstrated. Control of the particle composition and size was achieved by varying the experimental conditions. The Fe content in the FeCo particles can be varied from 90 to 20 mol %, and the size of the cubes can be controlled to obtain particles with sizes between 300 and 35 nm (see figure). The magnetic properties of the particles closely resemble those of bulk FeCo.

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