Comparison of microwave absorption properties of SrFe12O19, SrFe12O19/NiFe2O4, and NiFe2O4 particles
作者： M. Mehdipour , H. Shokrollahi
DOI: 10.1063/1.4816089
关键词:
摘要: In this study, ferrimagnetic (SrFe12O19, SrFe12O19/NiFe2O4, and NiFe2O4) nanostructure particles were synthesized by the co-precipitation of chloride salts using sodium hydroxide solution. The resulting precursors heat-treated at 1100 °C for 4 h. After cooling in furnace, ferrite powders pressed 10 bars then sintered 1200 °C saturation magnetization was increased coercivity decreased sintering (because morphology changing) alternating kind. For example, SrFe12O19, from 291 G to 300 G 2.8 kOe 1.8 sintering. microwave absorption properties studied ferromagnetic resonance transmit-line theories, as well Reflection Loss plots. Before sintering, RL spectra SrFe12O19 composite below −3 dB, but they reached −6 dB 11.1 GHz NiFe2O4. samples due reduction porosity damping factor. maximum −35 dB (at frequency) NiFe2O4 state.
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