Details

Autor(en) / Beteiligte

• Kaur, Mandeep
• Kaur, Pawandeep
• Bahel, Shalini

Titel

Study of magnetic, elastic and Ka-band absorption properties of Zn1−xCoxFe2O4 (0.00 ≤ x ≤ 1.00) spinel ferrites

Ist Teil von

• Materials science & engineering. B, Solid-state materials for advanced technology, 2023-11, Vol.297, p.116736, Article 116736

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Cobalt substituted zinc spinel ferrites are successfully synthesized using sol–gel citrate route.•Significant enhancement in saturation magnetization (Ms) and coercivity (Hc) with increase in cobalt doping are observed.•Elastic properties are improved with the substitution of Co2+ ions.•Composition x = 0.75 exhibited superior absorption characteristics with 99.14 % absorption at 34.60 GHz frequency and 1 mm sample thickness along with the −10 dB absorption bandwidth of 3.6 GHz.•The prepared Zn-Co ferrites are potentially applicable for microwave absorbing materials due to their minimum reflection loss, narrow matching thickness and wide absorption bandwidth in the Ka-band (26.5–40 GHz) frequency range. Magnetic, elastic, electromagnetic, and microwave absorption properties of cobalt-substituted zinc spinel ferrites Zn1-xCoxFe2O4 (0.00 ≤ x ≤ 1.00, Δx = 0.25) fabricated via the sol–gel citrate route are analyzed. The hysteresis loops of constituent ferrites revealed the rapid rise in saturation magnetization and coercivity with the doping of cobalt ions. The FT-IR spectra exhibit two vibrational bands in the scope of 521–560 cm−1 and 397–404 cm−1. Complex permittivity (ɛr) and complex permeability (µr) are analyzed using a vector network analyzer in Ka-band. The absorption is maximized by tuning the thickness of the sample from 0.8 mm to 3.5 mm using the quarter wavelength model. Maximum absorption of 99.14 % at a matching frequency of 34.60 GHz and a matching thickness of 1 mm is obtained by the composition with ×  = 0.75. The prepared ferrite composition proves to be an efficient microwave-absorbing material at high frequencies ranging from 26.5 to 40 GHz.