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<p>To explore the evolution of the magnetodielectric coupling with magnetic structure, in this work a series of Mn doped Ca<sub>3</sub>Co<sub>2−<i>x</i></sub>Mn<sub><i>x</i></sub>O<sub>6</sub> (<i>x</i> = 0, 0.02, 0.04, 0.06, 0.08, 0.1) were synthesized. Mn substitution does not change the rhombohedral structural framework. The introduced Mn not only breaks the long-range ferromagnetic ordering, but also results in an antiferromagnetic coupling in a narrow range of the spin chains. These two effects decrease the magnetic frustration. The correlation length of the short-range magnetic ordering in the third spin chain thus increases. The obvious dielectric anomalies around magnetic transitions prove the coupling between the spin and polarization fluctuations. The magnetodielectric coupling of the Ca<sub>3</sub>Co<sub>2−<i>x</i></sub>Mn<sub><i>x</i></sub>O<sub>6</sub> can be attributed to the flip of the spin. The current research highlights that chemical substitution is an effective method for regulating the magnetodielectric coupling of the frustrated low-dimensional oxides.</p>

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Effect of Mn-substitution on the structure, magnetization and dielectric properties of Ca3Co2O6 compound

  • 期刊论文

  • 发表日期：

    2026年2月28日

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  • Gaoshang Gong,
  • Yanxin Gao,
  • Xiaoying Chen,
  • Yongqiang Wang,
  • Yuling Su,
  • Maocai Wei

摘要

To explore the evolution of the magnetodielectric coupling with magnetic structure, in this work a series of Mn doped Ca3Co2−xMnxO6 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.1) were synthesized. Mn substitution does not change the rhombohedral structural framework. The introduced Mn not only breaks the long-range ferromagnetic ordering, but also results in an antiferromagnetic coupling in a narrow range of the spin chains. These two effects decrease the magnetic frustration. The correlation length of the short-range magnetic ordering in the third spin chain thus increases. The obvious dielectric anomalies around magnetic transitions prove the coupling between the spin and polarization fluctuations. The magnetodielectric coupling of the Ca3Co2−xMnxO6 can be attributed to the flip of the spin. The current research highlights that chemical substitution is an effective method for regulating the magnetodielectric coupling of the frustrated low-dimensional oxides.