The estimated critical exponents are consistent and reliable as corroborated using the scaling law and equations of state. The trend noted for β can be attributed to the increment in CGP regime with an increase in Mn-content.

The observed deviation of γ and unconventional value of δ can be ascribed to the increment of GP with Mn-concentration. With increment in Mn concentration, both exponents γ and β increase, where γ and β approach the disordered and ordered 3D Heisenberg class, respectively. For the parent alloy Fe 2CrAl, the critical exponent γ is estimated as ~ 1.34, which lies near to the ordered 3D Heisenberg class, whereas the obtained value of the critical exponent β ~ 0.273 does not belong to any universality class.

In this work, the influence of these inhomogeneous phases on the critical behaviour (around T C) of the above-mentioned series of alloys has been investigated in detail. Recent investigation on weak ferromagnets Fe 2-xMn xCrAl (0 ≤ x < 1) reveal the existence of a cluster glass phase (CGP) and a Griffiths-like phase (GP) below and above the ferromagnetic transition temperature ( T C), respectively.

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