Crystal structure analysis of Lanthanum Manganite (LaMnO3) based High Entropy Alloy using rietvield method and performed by mechanical milling technique. The materials used include La(Fe₀.₃₃Cu₀.₃₃Mn₀.₃₃)O₃ and La(Fe₀.₂₅Cu₀.₂₅Mn₀.₂₅Ni₀.₂₅)O₃ with ethanol solvent. The samples were milled for 5 hours, dried at 80°C for 24 hours, and sintered at 1100°…