Electronic structure and magnetic and electromagnetic wave absorption properties of BaFe12-xCoxO19 M-type hexaferrites

FeCoNiCr0.4CuX High-Entropy Alloys with Strong Intergranular Magnetic Coupling for Stable Megahertz Electromagnetic Absorption in a Wide Temperature Spectrum

“…The thermogravimetric curve (Figure f) shows that FeCoNiCr 0.4 Cu 0.2 HEAs only gain 5 wt % when temperature is up to 400 °C. Compared to other EM absorbers, FeCoNiCr 0.4 Cu 0.2 HEAs/resin composites have excellent and temperature-stable EM absorption performance in the MHz frequency range from −50 to 150 °C, as shown in Figure g. ,− Moreover, FeCoNiCr 0.4 Cu 0.2 HEAs not only have lower effective EM absorption frequency (Table S2) and temperature-stable EM absorption performance but also have excellent oxidation resistance, high Curie temperature, and good flexibility, as shown in Figure h. ,,,, Therefore, this novel absorber has distinguished comprehensive performance to adapt to various harsh service environments.…”

“…(f) Thermogravimetric and thermomagnetic curves of FeCoNiCr 0.4 Cu 0.2 HEAs. (g) Comparative chart of EM absorption performance in the MHz frequency range for EM absorbers. ,− (h) Comparative chart of the comprehensive performance for representative low-frequency absorbers. ,,,, …”

Enhanced microwave absorption features of Ba3Co2Fe24O41 hexaferrite by high lanthanium doping concentration

“…Our group has published some papers related to the microwave absorption properties of M‐type 12–14 and Z‐type 15 . The microwave absorption performances of W‐, Y‐, X‐, and U‐types were also studied by other groups 16–20 .…”

Three-Dimensional Bi2Fe4O9 Nanocubes Loaded on Reduced Graphene Oxide for Enhanced Electromagnetic Absorbing Properties

“…However, traditional magnetic metal absorbing materials (Fe, Co, Ni) with a high complex permeability make it difficult to satisfy the impedance match in materials and free space (Xu et al, 2018a ). Unlike common magnetic metals, ferrites with a relatively high Snoek's limit, medium-built saturation magnetization, and coercivity have become a popular new EM wave absorbing material (Rusly et al, 2018 ; Trana et al, 2019 ; Zhu et al, 2019 ). For example, Lee et al Prepared M-type hexaferrites BaFe 12−x Co x O 19 (x = 0–2), which were synthesized by a co-precipitation technique, in which relatively high reflection loss (RL) values with the frequency range of 0.1–15 GHz was obtained (Trana et al, 2019 ).…”

“…Unlike common magnetic metals, ferrites with a relatively high Snoek's limit, medium-built saturation magnetization, and coercivity have become a popular new EM wave absorbing material (Rusly et al, 2018 ; Trana et al, 2019 ; Zhu et al, 2019 ). For example, Lee et al Prepared M-type hexaferrites BaFe 12−x Co x O 19 (x = 0–2), which were synthesized by a co-precipitation technique, in which relatively high reflection loss (RL) values with the frequency range of 0.1–15 GHz was obtained (Trana et al, 2019 ). Matori et al used a mechanical activation high energy ball milling (HEBM) method to study the EM properties of multiferroic BiFeO 3 composites under temperatures of 700–800°C (Rusly et al, 2018 ).…”