Effects of Sr-substitution on the structural and magnetic behavior of Ba-based Y-type hexagonal ferrites
作者： Mukhtar Ahmad , Qasim Ali , Ihsan Ali , Ishtiaq Ahmad , M. Azhar Khan
DOI: 10.1016/J.JALLCOM.2013.05.076
关键词: Spectroscopy 、 Thermogravimetry 、 Coercivity 、 Diffraction 、 Materials science 、 Analytical chemistry 、 Saturation (magnetic) 、 Magnetization 、 Scanning electron microscope 、 Porosity 、 Mechanical engineering 、 Materials Chemistry 、 Mechanics of Materials 、 Metals and Alloys
摘要: Abstract Sr-substituted samples of Y-type hexagonal ferrites with chemical formula Ba 2− x Sr Ni 2 Fe 12 O 22 ( = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) were synthesized using the sol–gel autocombustion method and sintered at 1150 °C for 3 h. The investigated by differential thermal thermogravimetry analysis, X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy vibrating sample magnetometry. diffraction analysis reveals that single phase can be achieved substituting 2+ ions sites in ferrites. density bulk observed to decrease whereas porosity increased increasing Sr-concentration. All show well defined shape which is favorable microwave absorbing purposes. saturation magnetization values calculated from M–H loops law approach saturation. low coercivity a few hundred oersteds one necessary conditions electromagnetic (EM) materials suitable security, switching, sensing high frequency applications.
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