Microwave absorption in Sc- and CoTi-substituted Ba hexaferrite powders

Wideband electromagnetic wave absorber using doped barium hexaferrite in Ku-band

“…Minimum reflection loss of −34 dB can be obtained by sample "(e)". In comparison to previous papers [7][8][9][15][16][17][18][19][20][21][22], the obtained results indicate that by substituting iron with Mg, Mn, Co, and Ti, almost all Ku-bands can be covered.…”

Dielectric properties of M-type barium hexaferrite prepared by co-precipitation

“…The hexagonal ferrites are especially useful in the development of microwave absorbers, due to their large value of magnetisation, planar magnetic anisotropy, and complex permeability, which is greater than that in the microwave region. [19][20][21] Microwave absorption takes place due to lossy interaction between the magnetisation of ferrite material and the magnetic field of the electromagnetic wave incident on the microwave absorber. 19 With regards to the isochronal samples at a temperature of 1000 • C the initial mean value of loss tangent over the frequency range (1 MHz-1 GHz) was found to be 0.0056.…”

Static and high frequency magnetic properties of Mn–Co–Zr substituted Ba-ferrite

“…Recent developments in microwave absorber technology have resulted in materials that can effectively reduce the reflection of electromagnetic signals, on the one hand, and have good physical performance and lower production cost on the other [3,4]. There are a variety of absorber materials that can be used to suppress EMI depending on whether they are suitable for low and high frequency application [5][6][7][8][9]. As far as thickness and working frequency bandwidth are concerned, magnetic composites have obvious advantages.…”