Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
Volume 52, Issue 5, Pages 1474-1477Publisher
KOREAN PHYSICAL SOC
DOI: 10.3938/jkps.52.1474
Keywords
strontium ferrite; La-substituted; sol-gel method
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La-doped Sr-hexaferrite particles were prepared by using sol-gel method. Post-preparation calcination with the aim of improving the magnetic properties of the. as-synthesized particles was conducted at temperatures ranging from 800 degrees C to 1050 degrees C for 2 h in air. The effects of the calcination temperature and the La concentration (x = 0 - 0.15) on the crystallography, the particle morphology and the magnetic properties of La-doped Sr-hexaferrite were investigated by using X-ray diffraction (XRD), transmissions electron microscopy (TEM) and vibrating sample magnetometry (VSM). At a calcinations temperature of 850 degrees C, the intrinsic coercivity (H-i(C)) reached a maximum value of 7 kOe for the sample with x = 0.05 and the saturation magnetization (M-S) reached 72 emu/g after calcination at 1050 degrees C.
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