Study of Frequency-Dependent Electromagnetic Shielding Parameters of Al-doped M-type Ba-Hexaferrite

Yaseen Mohd

doi:10.36948/ijfmr.2026.v08i05.87118

Study of Frequency-Dependent Electromagnetic Shielding Parameters of Al-doped M-type Ba-Hexaferrite

Author(s)	Dr. Yaseen Mohd
Country	India
Abstract	Use of electronic and communication systems has become more intense with the time. A problem of electromagnetic interference (EMI) has arisen, and this makes it necessary to provide a lightweight and unobtrusive solution. Chemically stable, environmentally friendly materials that can diffuse unwanted electromagnetic radiation from the solution. In this work, Al-substituted M-type barium hexaferrite, BaFe₁₂₋ₓAlₓO₁₉ (x = 0.00, 0.02, 0.04, 0.06, and 0.08), was investigated as a multifunctional ferrite material for electromagnetic shielding applications. The sample was prepared by the citrate precursor method. Thereafter they underwent proper thermal treatment, and their electromagnetic response was systematically evaluated as a function of Al concentration and frequency. The analysis of the shielding effectiveness was done based on reflection loss (SER). Using the measured scattering, total shielding effectiveness was calculated. The results show that the substitution of Al has a significant effect on the magnetic response of M-type barium hexaferrite. The SEA is still relatively low, rises with frequency up to about 6GHz and rises with frequency. The composition that was investigated in this work is represented by x. The higher SER (4.09 dB) and SET are measured for the 0.02 sample at 12GHz. The 0.06 composition has comparatively higher shielding and reflection-related effectiveness. The shielding behaviour is frequency-dependent for both reflection and absorption. The attenuation of incident electromagnetic radiation is caused by reflection and absorption. The observed compositional dependency is due to the alteration of the Electromagnetic parameters and related polarisation and magnetic loss processes induced by Al3+ substitution. The result set the Al substituted M-type barium hexaferrite is a potential candidate for the field of EMI shielding and microwave attenuation, which has application in communication, electronic, and high-frequency fields and electromagnetic protection technologies.
Keywords	M type ferrite, Al dopant, citrate precursor method. EM shielding parameter
Field	Physical Science
Published In	Volume 8, Issue 5, September-October 2026
Published On	2026-09-05
DOI	https://doi.org/10.36948/ijfmr.2026.v08i05.87118

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Study of Frequency-Dependent Electromagnetic Shielding Parameters of Al-doped M-type Ba-Hexaferrite

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