Griffiths like Robust Ferromagnetism in Co3-xMnxTeO6; (x = 0.5, 1, 2)

TL;DR

This study reveals Griffiths-like ferromagnetism coexisting with antiferromagnetic correlations in Mn-doped Co3TeO6, demonstrating robust magnetic phases near room temperature and complex structural-magnetic interactions.

Contribution

It provides the first detailed magnetization analysis of Mn-doped Co3TeO6 showing Griffiths-like ferromagnetism and complex magnetic behavior linked to structural variations.

Findings

Robust ferromagnetic order at 185 K

Long-range antiferromagnetic correlations below 45 K

Evidence of Griffiths-like phase extending over a large temperature range

Abstract

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.