• S G Joshi

      Articles written in Bulletin of Materials Science

    • Structural, magnetic and electrical study of MgCoMnO4

      S G Joshi D K Kulkarni P V Khandekar

      More Details Abstract Fulltext PDF

      A new compound MgCoMnO4 has been synthesised by the oxide method. It crystallizes in a tetragonal spinel structure witha=8.30 A andc=8.46 A. The observed crystal symmetry is associated with the existence of Mn+3 on theB sites. The compound isn type semi-conductor with activation energy ΔE=0.33 eV. The electrical properties show that it can be regarded as a properly substituted MgMn2O4 by Co+3 ions. It is paramagnetic withCM=5.75 and ϑa =−160°K. All these results show the ionic configuration of the compound as Mg+2 [Co+3 Mn+3] O4.

    • Structural, magnetic and electrical study of CoMnAlO4

      S G Joshi D K Kulkarni P V Khandekar

      More Details Abstract Fulltext PDF

      A spinel CoMnAlO4 has been synthesised by the oxide method. It has a tetragonal structure withA=8.10 A andC=8.22 A. A break is found in the plot of logρ against 1/T at 573°K when activation energy changes from 0.62 eV to 0·52 eV. The electrical properties show that it can be regarded as a properly substituted CoMn2O4 by Al+3 ions. It is paramagnetic withCM = 4.72 and ϑa= −298°K. These results show the ionic configuration of the compound as Co+2 [Mn+3 Al+3]O4.

  • Bulletin of Materials Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.