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Abstract <p>The copper doped polycrystalline Cu<sub><i>x</i></sub>Ni<sub>1–<i>x</i></sub>Mn<sub>2</sub>O<sub>4</sub> (CNMO), Cu<sub><i>x</i></sub>Zn<sub>1–<i>x</i></sub>Mn<sub>2</sub>O<sub>4</sub> (CZMO), and Cu<sub><i>x</i></sub>Co<sub>1–<i>x</i></sub>Mn<sub>2</sub>O<sub>4</sub> (CCMO) with (0.05 ≤ <i>x</i> ≤0.55) manganites were synthesized by chemical co-precipitation route. The incorporation of copper in place of nickel, zinc and cobalt in all the three series of samples respectively change significantly the lattice parameters, crystal size, microstrain and dielectric properties at various frequencies. With the increase in copper the lattice parameter and crystallite size decreases for CNMO, CZMO samples and increases for CCMO samples respectively. The dielectric constant increases from 35 to 950, 70 to 410 for CNMO, CZMO samples and (7 to 20) × 10<sup>3</sup> for CCMO samples at low frequency (10 Hz) with the increment in copper doping.</p>

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Unveiling the Morphological and Dielectric Changes in Copper-Doped Nano Manganites

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • H. Shashidharagowda,
  • S. R. Manohara,
  • Shridhar N. Mathad

摘要

Abstract

The copper doped polycrystalline CuxNi1–xMn2O4 (CNMO), CuxZn1–xMn2O4 (CZMO), and CuxCo1–xMn2O4 (CCMO) with (0.05 ≤ x ≤0.55) manganites were synthesized by chemical co-precipitation route. The incorporation of copper in place of nickel, zinc and cobalt in all the three series of samples respectively change significantly the lattice parameters, crystal size, microstrain and dielectric properties at various frequencies. With the increase in copper the lattice parameter and crystallite size decreases for CNMO, CZMO samples and increases for CCMO samples respectively. The dielectric constant increases from 35 to 950, 70 to 410 for CNMO, CZMO samples and (7 to 20) × 103 for CCMO samples at low frequency (10 Hz) with the increment in copper doping.