The present work is an experimental study and interested in hexaferrite samples preparation of the system Ba0.2Sr0.8Fe12O19 nanoparticle powder by chemical coprecipitation method used to prepare fine nanoparticles. The structural properties of this system have been investigated using scanning electron microscopy-Energy dispersive X-Ray spectroscopy (SEM-EDS) and were found the average grain size to be (33.685)nm. Magnetic properties were calculated by vibrating sample magnetometry (VSM), it was the results proved that the saturation magnetization reaches to (85.633)emu/gr and the residual magnetization is (39.342)emu/gr. The coercivity of (4665.909)Oe is also observed. The hysteresis loop was studied and shown that, this system of hard ferrite materials.
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