• P GANGA RAJU ACHARY

      Articles written in Bulletin of Materials Science

    • Structural, impedance and electrical evaluation of complex perovskite: Ca(Mn$_{1/3}$Ni$_{1/3}$W$_{1/3}$)O$_3$

      MINAKSHI PADHY DEEPTIMAYEE KHATUA SUJIT KUMAR DEHURY R N P CHOUDHARY P GANGA RAJU ACHARY

      More Details Abstract Fulltext PDF

      A complex perovskite Ca(Mn$_{1/3}$Ni$_{1/3}$W$_{1/3}$)O$_3$, abbreviated as CMNWO, is synthesized by adopting the solid-stateceramic procedure. The X-ray diffraction analysis of CMNWO shows that the present perovskite is acquiring a cubic crystal structure having the cell dimension of $a = 3.8321$ Å. The obtained cell parameter is in good agreement with the theoretical cell parameter obtained from the SPuDS-V2.19.05.14 code. The micrograph describes the uniform grain distribution in the CMNWO sample. The average crystallite size of the sample was found to be 50.98 nm, which was calculated using the Scherrer relation. The dielectric and electrical properties like dielectric constant, dissipation factor, impedance, electrical modulus and conductivity of CMNWO were studied. The activation energies were determined from the AC-conductivity data in the temperature range of 200–350$^{\circ}$C and 360–500$^{\circ}$C. The dielectric spectra with temperature suggest that the present CMNWO is semiconducting in nature and follows the negative temperature coefficient of resistance kind of behaviour.

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