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Enhancing static and dynamic magnetic properties of Mg-Zn doped Co2Y-type hexaferrite as broadband microwave absorbing material

M. H. SHAMS1, S. H. ROZATIAN1,* , M. H. YOUSEFI1

Affiliation

  1. Department of Physics, University of Isfahan, Hezar Jarib Street, Isfahan 81746-73441, Iran

Abstract

New Ba2Co2-x (MgZn)xFe12O22 (x=0, 0.5, 1, 2) Y-type hexaferrites were synthesized by solid state ceramic method to tailor their electromagnetic properties. Subsequently, the effects of Mg2+ and Zn2+ dopants on the static and dynamic magnetic properties at 300 MHz to 40 GHz were studied. The crystalline structure, particle size and static and dynamic magnetic properties were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer and vector network analyzer, respectively. The results showed that the saturation magnetization and the complex permeability values have been increased while the coercive field and the resonance frequency decreased by increasing the amount of dopants. The reflection loss and thickness of composite samples were optimized based on the maximum RL bandwidth for -10 dB. Compared with pure Co2Y-type hexaferrite, Mg-Zn doped Co2Y-type hexaferrite composites exhibited enhanced absorbing properties at S, C, X and Ku frequency bands..

Keywords

Microwave material, Barium hexaferrite, Magnetic properties, Solid state ceramic method.

Submitted at: March 16, 2015
Accepted at: May 7, 2015

Citation

M. H. SHAMS, S. H. ROZATIAN, M. H. YOUSEFI, Enhancing static and dynamic magnetic properties of Mg-Zn doped Co2Y-type hexaferrite as broadband microwave absorbing material, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 5-6, pp. 614-622 (2015)