Observation of magnetic cluster phase above Curie temperature in Fe2CrAl Heusler alloy

► Magnetization vs temperature data of Fe2CrAl alloy shows two transitions around 208 K and 313 K. ► We have established that first magnetic transition (208 K) to be a ferromagnetic transition. ► The estimated critical exponents are in between 3D Heisenberg and mean-field models. ► It is shown that the short range magnetic correlation exist even at 313 K with cluster moment ∼102 μB. ► This is attributed to site-disorder, results in formation of Cr clusters.