1. Tailoring properties of Ni0.50Co0.50DyxFe2–xO4 ceramics using microwave non-thermal plasma for high-frequency devices.
- Author
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Munir, Muhammad Adnan, Naz, Muhammad Yasin, Shukrullah, Shazia, Naz, Ahmad, Irfan, Muhammad, Rahman, Saifur, and Mursal, Salim Nasar Faraj
- Subjects
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NON-thermal plasmas , *PERMITTIVITY , *MICROWAVE plasmas , *DIELECTRIC properties , *DIELECTRIC loss - Abstract
Dysprosium doped Ni0.50Co0.50DyxFe2−xO4 (x = 0.25, 0.50, 0.75) was synthesized via auto combustion of nitrate citrate gel. The prepared composites were given microwave plasma treatment to improve their dielectric properties for constructing high-frequency devices. X-ray diffraction analysis confirmed the production of Dy-doped cubic spinel NiCo ferrites. The average crystallite size for the untreated magnetic composite was 32.10 nm, while for plasma-treated samples was 25.17 nm. A growth in lattice parameters and decreased porosity was observed in plasma-treated composites. VSM findings revealed a decrease in saturation magnetization from 54.15 to 36.75 emu/g with an increase in Dy3+ from 0.25 to 0.50%. Saturation magnetization again raised with increasing Dy3+ content from 0.50 to 0.75%. The lower Dy3+ concentration resulted in low saturation magnetization, while the high Dy3+ concentration showed high saturation magnetization of the composite. Temperature and frequency-dependent dielectric characteristics revealed bulbous enrichment in the dielectric constant and significant Q factor for plasma-treated samples. The perceived deviation in dielectric loss with frequency change is credited to the conduction phenomenon, which agrees with Koop's phenomenological theory. High dielectric constant and low dielectric loss, even at higher temperatures, enable the synthesized ferrites to be strong candidates for high-frequency devices. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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