Magnetic and microwave absorption properties of Cu/Zr doped M-type Ba/Sr hexaferrites prepared via sol-gel auto-combustion method

In this research, the magnetic, structural and microwave properties of Ba(0.5)Sr(0.5)Cu(x)ZrxFe(12-2)xO(19) (BSCZH) (where x = 0-0.8) hexaferrite nanoparticle prepared by the auto-combustion sol-gel method have been investigated. The effect of substituted Cu+2-Zr+4 ions of the barium strontium hexaferrite was characterized by FT-IR, XRD, SEM, VSM and VNA methods. The XRD pattern represents that the materials have a single magnetoplumbite phase, and the crystalline size of the particles varies from 42 to 48 nm at X= 0-0.8%. The coercivity (H-c) and saturation magnetization (M-s) and remanent magnetization (M-r) obtained by VSM (Vibrating Sample Magnetometer) technique. The results of the magnetic measurement indicate that the coercivity decreases by substitution of Cu+2-Zr+4 from x = 0 (5010 0e) to x= 0.8(301.18 Oe) whereas saturation magnetization (M-s) first increased from x = 0-0.4 mol% and then decreased from x = 0.6 to 0.8. FESEM results indicate that the particle morphology is randomly hexagonal. Also, microwave properties of Ba0.5Sr0.5Cu0.4Zr0.4Fe11.2O19 (BSCZH) exhibit the minimum reflection loss of -15.2 db at 11.1 GHz and the result shows that Cu+2-Zr+4 substation on the barium strontium hexaferrite nanoparticle is useful for microwave application in the frequency range 8-12 GHz. (C) 2018 Elsevier B.V. All rights reserved.