Effect of Nd content on natural resonance frequency and microwave permeability of Nd2Fe14B/α-Fe nanocomposites in 26.5–40GHz frequency range

Microwave properties of surface modified Fe–Co–Zr alloy flakes with mechanochemically synthesized polystyrene

“…These can be attributed to the improved impedance matching as a result of proper combination between modified complex permittivity and permeability by polystyrene coating. Additionally, the shift of RL peak to higher frequency is due to the decrease of the according to the relation f m = 2 cd m at a given thickness, where d m and f m are the absorber thickness and matching frequency [16]. However, the RL peak intensity of sample S3 is smaller than that of sample S2, probably because excessively thick coat results in too low dielectric and magnetic loss.…”

Structure and microwave absorption properties of Nd–Co–Ni alloys

“…There a relationship between the absorber thickness d m and magnetic loss l 00 r of absorbers by Eq. (4) [22] :…”

Magnetic and electromagnetic properties of composites of iron oxide and Co–B alloy prepared by chemical reduction

“…For magnetic EM wave absorbers, the relative complex permeability (m r ¼m r 0 +jm r 00 ) and permittivity (e r ¼e r 0 +je r 00 ) of materials determine reflection and attenuation characteristics of absorbers. Metallic magnetic materials have large saturation magnetization, but for Snoek's limits their use as high frequency absorbers is still limited [8][9][10][11][12][13][14]. Moreover, the high-frequency permeability of these materials decreases due to the eddy current loss induced by EM waves.…”