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The effect of Mn-Co-Ti dopants on the magnetic properties, Complex permittivity, permeability, and microwave absorbing characteristics of barium hexaferrite

MOHAMMAD H. SHAMS1, AMIR S. H. ROZATIAN1, MOHAMMAD H. YOUSEFI1,*

Affiliation

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

Abstract

In this research, doped barium M-type hexaferrites with the composition of BaFe12-x(MnCo)0.5xTi0.5xO19 (x=1.5, 2, 2.5) were synthesized by the conventional ceramic method. The crystalline structure, particles size, magnetic properties, complex permittivity, complex permeability and microwave absorption properties were investigated by X-ray diffraction, Scanning Electron Microscope, Vibrating Sample Magnetometer and Vector Network Analyzer. The results showed that samples with the Magnetoplumbite structures and widely distributed particle sizes were formed. The coercive force and resonance absorption frequency of samples were reduced by raising the amount of Mn-Co-Ti dopants. The optimal reflection loss plots of composite samples in different frequency bands were calculated with a computer code to find the optimal thickness for each material based on the maximum reflection loss bandwidth for -10dB. It was also found that all samples showed good performance at C, X and Ku frequencies bands in terms of microwave absorption..

Keywords

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

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

Citation

MOHAMMAD H. SHAMS, AMIR S. H. ROZATIAN, MOHAMMAD H. YOUSEFI, The effect of Mn-Co-Ti dopants on the magnetic properties, Complex permittivity, permeability, and microwave absorbing characteristics of barium hexaferrite, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 5-6, pp. 623-628 (2015)