WehavemeasuredthetransformationtemperatureofNi52 . 2 Mn2 3 . 8Ga2 4singlecrystallinesamplebyvariousmethods,suchasDSC ,magnetization ,acmagneticsusceptibility,dcresistance,andtransformationstrain .Comparingtheexperimentalresultsbetweeneachother,wefoundthat,duetothedifferentphysicalmechanism ,variousmeasuringmethodswillgivedifferentmar tensitictransformationtemperatures.Basedontheseobservations,wesuggestamulti steplatticedeformationforthetransforma tionofNiMnGa,whichissimilartotheG Trelation .ThewholeprocessoftransformationcanbeobservedbyDSCandR Tmea surements ,whilethemagneticmeasurementsisonlysensitivetotheformationofmartensiticlattices.Themeasurementontrans formationstrainisnotsoreliableforthetransformationtemperatureastheothermeasurements,butitreallyreflectsthesituationofthesub structures,suchastwinboundaries,variantsanddefectsinthematerial.