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

Effect of Nd–Co substitution on magnetic and microwave absorption properties of SrFe12O19 hexaferrites

“…The most current research focuses on using ZnO composites [4][5][6][7], carbon nanotubes [8,9], ferrites [10,3,11], metal alloys [12] and so on, as absorbents. M-type ferrites have been widely used as microwave attenuation materials and have recently received considerable attention from researchers [13][14][15][16][17] because of their large anisotropy field, high saturation magnetization, and excellent chemical stability. Many studies have been recently carried out to investigate the influence of rare earth substitution on magnetic and microwave absorption properties of ferrite materials [18][19][20].…”

Effects of Sheet Thickness on the Electromagnetic Wave Absorbing Characterization of Li0.375Ni0.375Zn0.25-Ferrite Composite as a Radiation Absorbent Material

“…To prepare the measurement of the return loss, the toroid samples were inserted into the coaxial sample holder. The variations in the return loss versus frequency in the range of 10 MHz to 12 GHz were investigated using a network analyzer(Agilent E8363B; Agilent Technologies, Santa Clara, CA, USA) [22][23][24]. Fig.…”

“…2(b). It is determined that the lithium oxide, nickel oxide, zinc oxide, and iron oxide particles were mixed and agglomerated to make LiNiZn-ferrite particles [24].…”

Cu-substituted barium hexaferrite crystal growth and characterization

“…Several processing methods with various dopants have been adopted to produce materials with modified magnetic parameters suitable for high-density magnetooptical recording and microwave applications [2][3][4]. The magnetic properties of substituted barium ferrites strongly depend on synthesis conditions and are connected with the dopant preference among the five different crystallographic sites for Fe 3+ in BaFe 12 O 19 .…”

“…The magnetic loss in this material is mainly due to the resonance absorption of moving magnetic domains in a lower frequency and incoherent rotation of magnetization in a higher frequency [1]. Both magnetic and microwave properties of hexaferrites like saturation magnetization, coercivity and loss tangent, can be tailored by partial substitution of Fe 3+ ions by different tetravalent (Ti 4+ , Zr 4+ ) and divalent (Co 2+ , Mn 2+ , Zn 2+ , Ni 2+ , Mg 2+ ) ions [2][3][4][5]. Barium hexaferrite has a ferromagnetic resonance frequency around 40 GHz due to its high magnetic anisotropy field.…”