The electric and thermal transport properties (electric resistivity ρ, magneto-resistance MR, Hall coefficient RH and anomalous Hall effect, thermal conductivity Κ and Seebeck coefficient S) of the off-stoichiometric Ni1.92Mn1.56Sn0.52 Heusler alloy were measured. The positive values of the Hall coefficient RH has been determined in martensite phase of the alloy at low temperatures and the negative value of RH was detected in austenite phase. The standard relations were used to describe the measured temperature dependence of the Seebeck coefficient. All the received result point to an important role of changes in electronic structure of the alloy in all the studied transport effects. A scenario of the complex behavior of the transport properties of the Heusler alloy based on a possible existence of an energy gap in electronic structure is discussed.
