The structural and magnetic properties of the Co2MnAl full Heusler alloy is investigated withemphasis on disorder-driven magnetic behavior. X-ray diffraction confirms the formation of a orderedL21 cubic structure. Magnetization measurements reveal soft ferromagnetic behavior with a Curietemperature of 𝑇𝑐 ≈ 696 K. The thermal demagnetization follows modified Bloch’s law at lowtemperatures, indicating dominant spin-wave contributions. A clear deviation from Curie–Weissbehavior above 𝑇𝑐 is observed, indicating the presence of short-range ferromagnetic correlations.The existence of a finite temperature range between 𝑇𝑐 and the Griffiths temperature (𝑇𝐺 ≈ 862 K)confirms the emergence of a Griffiths-like phase. The extracted Griffiths exponent 𝜆𝐺 ≈ 0.92764suggests magnetic inhomogeneity in Co2MnAl.