Preparation and Characterization of Nanocrystalline Misch-Metal-Substituted Yttrium Iron Garnet Powder by the Sol–Gel Combustion Process
Nanocrystalline Y3−xMMxFe5O12 powders (MM denotes Misch-metal, x=0.0, 0.25, 0.5, 0.75, and 1.0) were synthesized by a sol–gel combustion method. Magnetic properties and crystalline structures were investigated using X-ray diffraction (XRD), a vibrating sample magnetometer (VSM), and a scanning electron microscope. The XRD patterns showed that the single-phase garnet of Y3−xMMxFe5O12 was formed at x values ≤1.0. The saturation magnetization of powders increased with decreasing MM content and reached the maximum value at Y3Fe5O12. The crystallite size of powders calcined at 800°C for 3 h was in the range of 38–53 nm.
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Document Type: Research Article
Affiliations: Materials Science and Engineering Department, Sharif University of Technology, Tehran 14584, Iran
Publication date: 2008-09-01