Abstract
The Sr1-xYxFe12O19 (x =, 0.05, 0.1, 0.15) series hexagonal ferrite samples were successfully prepared by the sol-gel method. X-ray diffraction (XRD) showed that Y3+ successfully replaced Sr2+ sites, resulting in a reduction of lattice parameters and unit cell volume. Mössbauer spectral analysis showed that Y3+doping caused the conversion of some Fe3+ to Fe2+ at the 2a site, resulting in a decrease in the average hyperfine field of the doped samples. Vibrating sample magnetometer (VSM) measurements indicated that with increasing Y3⁺ content, the saturation magnetization of the samples decreased, while the coercivity significantly increased. Notably, at a doping level of x = 0.05, the sample exhibited a coercivity of 4798.09 Oe, representing a 99.11% increase compared to the undoped sample, while the saturation magnetization only decreased by 3.24%.
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