  The effect of Cr doping with nominal compositions Mn2-xCrxO3 (0 less than
equal to x less than equal to 0.10) has been undertaken to investigate its
effect on structural, magnetic, dielectric and magnetoelectric properties. The
Cr doping transformed the room temperature crystal structure from orthorhombic
to cubic symmetry. Similar to alpha-Mn2O3, two magnetic transitions have been
observed in the Cr doped samples. The effect of Cr doping is significant on the
low temperature transition i.e. the lower magnetic transition shifted towards
higher temperature (25 K for pristine to 40 K for x=0.10) whereas the high
temperature transition decreases slightly with increasing Cr content. A clear
frequency independent transition is observed in complex dielectric measurements
for all compositions around high temperature magnetic ordering. Interestingly,
the magnetodielectric behaviour enhanced enormously approx 21% with Cr
substitution as compared to pristine Mn2O3.
