Studies on dielectric and magnetic properties of CaCu3Ti3MnO12 ceramic synthesized via semi-wet route

Abstract

CaCu3Ti3MnO12 (CCTMO) ceramic has been successfully synthesized by the semi-wet route and sintered at 1223 K for 8 h, which is confirmed by XRD analysis to ensure CaCu3Ti3MnO12 (CCTMO) phase formation. The microstructure, phase-structure, and thermal behavior were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA), respectively. After Mn-doping, the dielectric constant decreases from 104 to 102. The particle size as well as grain size measured by TEM and SEM techniques which were found to be 43.76 ± 10 nm and 1.46 μm, respectively. The route mean square and average roughness observed by atomic force microscope (AFM) analysis were 0.141 μm and 0.109 μm, respectively. The temperature-dependent ferromagnetic nature of CCTMO ceramic was confirmed by zero field cooled (ZFC), field cooled (FC), and M-H hysteresis curves. The investigated magnetic property of CCTMO confirmed paramagnetic behavior at 300 K and ferromagnetic behavior at 5 K. The dielectric constant (ɛr) increases when temperature increases, although dielectric constant and dielectric loss were observed 100 and 0.1, respectively.

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Acknowledgments

The author would like to thank in-charge of central instrument facility centre (CIFC), IIT (BHU) Varanasi for SEM, TEM, AFM, and MPMS facilities.

Funding

One of the authors Santosh Pandey received financial support for teaching assistantship from IIT (BHU).

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Correspondence to K. D. Mandal.

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Pandey, S., Kumar, A., Singh, N.B. et al. Studies on dielectric and magnetic properties of CaCu3Ti3MnO12 ceramic synthesized via semi-wet route. J Aust Ceram Soc 56, 915–922 (2020). https://doi.org/10.1007/s41779-019-00427-2

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Keywords

  • Semi-wet route
  • Dielectric properties
  • Magnetic properties