Effect of alloying additions and atomic disordering on the physical properties of magnetic Ni _2MnGa-based shape memory alloys

摘要

The effect of atomic disordering induced by melt quenching or severe plastic deformation via high-pressure torsion on the physical properties (thermal expansion coefficient, electrical resistivity, thermoelectric power, magnetization) of a stoichiometric Ni _(50)Mn _(25)Ga _(25) alloy and nonstoichiometric Ni _(50)Mn _(28.5)Ga _(21.5) alloys with 2 at % Cu or Co is studied in the temperature range 2 K ≤ T ≤ 900 K and the magnetic field range H ≤ 7 MA/m.