Morphology and magnetic traits of strontium nanohexaferrites:Effects of manganese/yttrium co-substitution
来源期刊：JOURNAL OF RARE EARTHS2019年第7期
论文作者：M.A.Almessiere Y.Slimani H.S.El Sayed A.Baykal
文章页码：732 - 740
摘 要：Doped strontium（Sr） hexaferrites appeared potential candidates for microwave absorber applications.Driven by this idea, we examined the influence of manganese（Mn） and yttrium（Y） co-substitution on the microstructures,morphology and magnetic properties of Sr nanohexaferrites(Sr1-xMnxFe12-yYyO19,where 0.0 ≤ x = y ≤ 0.5) synthesized via citrate sol-gel auto-combustion technique. As-prepared samples were thoroughly characterized using diverse analytical tools. X-ray diffraction pattern reveals a single Mhexagonal crystalline phase. FE-SEM, TEM, HR-TEM show a hexagonal platelet-like structure. The magnetic hysteresis loops（measured at room and low temperature） of the as-prepared nanohexaferrites exhibit ferromagnetic（FM） behavior. Magnetic parameters including the saturation magnetization,remanence, coercive and magneto-crystalline anisotropy field are found to decrease with the increase in Mn2+ and Y3+ contents. Zero-and normal-field cooled magnetization measurements in the range of 2-400 K display the complete absence of blocking temperature, confirming the characteristic ferromagnetic behavior of the proposed composition.
M.A.Almessiere1,2，Y.Slimani3，H.S.El Sayed2，A.Baykal2
1. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University2. Department of Nano-Medicine Research, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University3. Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University
摘 要：Doped strontium（Sr） hexaferrites appeared potential candidates for microwave absorber applications.Driven by this idea, we examined the influence of manganese（Mn） and yttrium（Y） co-substitution on the microstructures,morphology and magnetic properties of Sr nanohexaferrites(Sr1-xMnxFe12-yYyO19,where 0.0 ≤ x = y ≤ 0.5) synthesized via citrate sol-gel auto-combustion technique. As-prepared samples were thoroughly characterized using diverse analytical tools. X-ray diffraction pattern reveals a single Mhexagonal crystalline phase. FE-SEM, TEM, HR-TEM show a hexagonal platelet-like structure. The magnetic hysteresis loops（measured at room and low temperature） of the as-prepared nanohexaferrites exhibit ferromagnetic（FM） behavior. Magnetic parameters including the saturation magnetization,remanence, coercive and magneto-crystalline anisotropy field are found to decrease with the increase in Mn2+ and Y3+ contents. Zero-and normal-field cooled magnetization measurements in the range of 2-400 K display the complete absence of blocking temperature, confirming the characteristic ferromagnetic behavior of the proposed composition.
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