Purpose:　The　current　study　aims　to　enhance　the　double　diffusive　natural　convection　in　an　Ostwald-de　Waele　fluid　filled　in　a　hexagonal　enclosures　using　non-uniform　magnetic　field　embedded　with　circular　obstacle.　The　upper　wall　has　maximum　temperature　Th∗　and　concentration　(Ch∗)　whereas　the　lower　wall　is　kept　at　minimum　temperature　Tc∗　and　concentration　Cc∗.　The　parameters　that　play　a　significant　role　in　the　heat　and　mass　transfer　are　evaluated,　including　Hartmann　number,　power　law　index,　Rayleigh　number　and　buoyancy　ratio.　Design/Methodology/approach:　In　two-dimensions,　the　governing　formulation　is　written　as　a　set　of　balancing　equations　for　velocities,　pressures,　energies　and　concentrations.　The　nonlinear　governing　PDEs　are　solved　using　numerical　approach　based　on　Finite　Element　Method　(FEM).　The　discretization　is　performed　using　the　stable　finite　element　pair　℘2/℘1.　Code　validation　and　results　are　ensured　by　conducting　a　grid　convergence　and　comparison　test　respectively.　Findings:　The　influence　of　flow　on　velocity,　isotherms　and　iso-concentration　field　is　examined　by　analyzing　a　broad　variety　of　variables　such　as　power-law　index　0.7≤n≤1.2,　Hartmann　number　0≤Ha≤50,　Rayleigh　number　104≤Ra≤106,　inclination　angle　0°≤γ≤90°　and　buoyancy　ratio　-2≤N≤2.　The　findings　are　displayed　graphically,　including　the　flow,　temperature　and　concentration　fields.　Heat　and　mass　transfer　rates　are　maximum　for　shear　thinning　fluids　while　for　shear　thickening　fluids　it　reduces,　whereas　it　is　maximum　for　concentration　dominated　assistant　flow　and　minimum　for　concentration　dominant　counter　flow.　Application:　The　novel　aspects　of　the　research　include　its　thorough　examination　of　solar　thermal　power　conversion　and　its　inventive　energy　deficiency　devices　and　a　wide　range　of　electrical　design　applications.　©　2023　The　Authors