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<p>Synthesis of M-type hexaferrites SrCo<sub>x</sub>Zn<sub>x</sub>Fe<sub>12−2x</sub>O<sub>19</sub> has been performed using the sol-gel method. The phase purity was investigated using X-ray diffraction (XRD) analysis. The formation of needle-shaped grain structures was observed from scanning electron microscopy (SEM). Magnetic hysteresis analysis was carried out to determine the various magnetic parameters. Furthermore, the absorption characteristics were also investigated. The coercivity decreased from 6263 to 4027 Oe, however, the saturation magnetization increased (89.32 to 101.9 emu/g). Zn<sup>2+</sup> and Co<sup>2+</sup> doping has enhanced the absorption as composition SCZF 2 had the highest RL of -39.74 dB at 6.9&#xa0;mm with a bandwidth of 1.26&#xa0;GHz at a matching input impedance (Z<sub>in</sub>) of 370.72 Ω (Z<sub>real</sub>=370.89 Ω and Z<sub>img</sub>=4.70 Ω). The highest − 10 dB broad bandwidth of 1.52&#xa0;GHz was obtained at 6.5&#xa0;mm in composition SCZF 3. The observed lightweight, wideband characteristics of fabricated samples have good scope for absorber applications in defense and commercial applications.</p>

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Investigation of structural, hysteresis, and microwave dielectric/magnetic properties of Co-Zn doped M-type strontium hexaferrites for light-weight microwave absorber applications

  • 期刊论文

  • 发表日期：

    2025年2月20日

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  • Sayed Tathir Abbas Naqvi,
  • Sachin Kumar Godara,
  • Bishakha Ray,
  • Suwarna Datar,
  • Charanjeet Singh

摘要

Synthesis of M-type hexaferrites SrCoxZnxFe12−2xO19 has been performed using the sol-gel method. The phase purity was investigated using X-ray diffraction (XRD) analysis. The formation of needle-shaped grain structures was observed from scanning electron microscopy (SEM). Magnetic hysteresis analysis was carried out to determine the various magnetic parameters. Furthermore, the absorption characteristics were also investigated. The coercivity decreased from 6263 to 4027 Oe, however, the saturation magnetization increased (89.32 to 101.9 emu/g). Zn2+ and Co2+ doping has enhanced the absorption as composition SCZF 2 had the highest RL of -39.74 dB at 6.9 mm with a bandwidth of 1.26 GHz at a matching input impedance (Zin) of 370.72 Ω (Zreal=370.89 Ω and Zimg=4.70 Ω). The highest − 10 dB broad bandwidth of 1.52 GHz was obtained at 6.5 mm in composition SCZF 3. The observed lightweight, wideband characteristics of fabricated samples have good scope for absorber applications in defense and commercial applications.