Charge carrier concentration and structural transition temperatures in Heusler alloys Ni(50)Mn(36)Sb(14-x)Z(x) (Z = Al, Ge; x=0; 1; 2; 3; 4)

The temperature dependences of magnetization and electrical resistance of the Ni(50)Mn(36)Sb(14-x)Z(x) (Z = Al, Ge; x = 0; 1; 2; 3; 4) alloys have been used to determine the structural transition temperatures (STT) such as: M-s, M-f, A(s) and A(f) (temperatures of the start and finish of martensitic and austenitic transformations, respectively). Effect of various parameters (e/a, V-cell, n) on the STT was studied. Using Hall Effect the concentration of charge carriers n* was obtained and it was found that n* is not strongly correlated with a behaviour of STT, there is only a general trend with exceptions.