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<p>The sol–gel method was employed to synthesize the Zn<sub>1-x</sub>Ag<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> (<i>x</i> = 0.0 to 0.40) nanoferrites. The XRD outline established the generation of cubic crystal structure of the compound. The crystallite size, lattice constant, density and other microstructural parameters were detected as a function of Ag content. The lattice constant was found to be enhanced from 8.02 to 8.30&#xa0;Å. Crystallize size was observed in nanometer range from 13.26 to 29.70&#xa0;nm. The mean size of grains was computed within the micrometer range, with values from 1.77 to 2.64&#xa0;µm. The FTIR spectra illustrated the presence of a metal oxide band in all of the synthesized samples. For every composition, the energy band gap (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({E}_{g}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>E</mi> <mi>g</mi> </msub> </math></EquationSource> </InlineEquation>) was calculated and the <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({E}_{g}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>E</mi> <mi>g</mi> </msub> </math></EquationSource> </InlineEquation> magnitudes ranged from 1.20 -1.70&#xa0;eV. The bare Zn nanoferrites had greater dielectric constant <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\((\varepsilon^{\prime})\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">(</mo> <msup> <mi>ε</mi> <mo>′</mo> </msup> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation> values than Ag- doped ceramics. A very small value of dielectric loss (&lt; 1%) was seen for all samples. An improved value of complex initial permeability <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\((\mu^{\prime})\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">(</mo> <msup> <mi>μ</mi> <mo>′</mo> </msup> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation> was observed and the optimal value of <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(\mu^{\prime}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>μ</mi> <mo>′</mo> </msup> </math></EquationSource> </InlineEquation> was seen 783 for the <i>x</i> = 0.40 composition. The saturation magnetization (<InlineEquation ID="IEq6"> <EquationSource Format="TEX">\({M}_{s}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>M</mi> <mi>s</mi> </msub> </math></EquationSource> </InlineEquation>) was noticed higher than that of undoped ferrites. The highest value of <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\({M}_{s}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>M</mi> <mi>s</mi> </msub> </math></EquationSource> </InlineEquation> was found 65.09&#xa0;emu/g for <i>x</i> = 0.30 sample.</p>

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Synthesis and characterization of structural, optical, dielectric and magnetic properties of Ag doped Zn1-xAgxFe2O4 ferrites for multifunctional applications

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Rabeya Bosri,
  • Md Nayem Mia,
  • M. N. I. Khan,
  • Mohammad J. Miah

摘要

The sol–gel method was employed to synthesize the Zn1-xAgxFe2O4 (x = 0.0 to 0.40) nanoferrites. The XRD outline established the generation of cubic crystal structure of the compound. The crystallite size, lattice constant, density and other microstructural parameters were detected as a function of Ag content. The lattice constant was found to be enhanced from 8.02 to 8.30 Å. Crystallize size was observed in nanometer range from 13.26 to 29.70 nm. The mean size of grains was computed within the micrometer range, with values from 1.77 to 2.64 µm. The FTIR spectra illustrated the presence of a metal oxide band in all of the synthesized samples. For every composition, the energy band gap ( \({E}_{g}\) E g ) was calculated and the \({E}_{g}\) E g magnitudes ranged from 1.20 -1.70 eV. The bare Zn nanoferrites had greater dielectric constant \((\varepsilon^{\prime})\) ( ε ′ ) values than Ag- doped ceramics. A very small value of dielectric loss (< 1%) was seen for all samples. An improved value of complex initial permeability \((\mu^{\prime})\) ( μ ′ ) was observed and the optimal value of \(\mu^{\prime}\) μ ′ was seen 783 for the x = 0.40 composition. The saturation magnetization ( \({M}_{s}\) M s ) was noticed higher than that of undoped ferrites. The highest value of \({M}_{s}\) M s was found 65.09 emu/g for x = 0.30 sample.