Griffiths like Robust Ferromagnetism in Co3-xMnxTeO6; (x = 0.5, 1, 2)
  We report near room temperature ferromagnetic as well as low temperature antiferromagnetic correlations in Mn doped Cobalt Tellurate (CMTO) solid solutions using thorough magnetization studies. For all the composition the solid solutions show not only short range robust FM order at 185 K but also show long range enhanced AFM order less than or equal to 45 K. Scaling of inverse magnetic susceptibility data provide clear indication of Griffiths like FM phase extended over large thermal region and its robustness against magnetic field. Variations in both the phases as a function of Mn concentration also support our observation of anomalous behavior in the average bond distances and charge states (JAP 116: 074904 (2014)). Further an attempt towards the structural insight into the observed complex magnetic behavior by using network like structural analysis has been drawn. These observations make this an interesting magnetic system from fundamental and application perspective. 
Harishchandra Singh, Haranath Ghosh, C. L. Prajapat, and M. R. Singh
cond-mat.mtrl-sci