Magnetic shape memory alloy material comprising nickel, manganese, gallium and cobalt in a composition, useful e.g. to implement a control and/or sensor device for automotive engineering, industrial or medical and/or measurement technology

摘要

Magnetic shape memory alloy material with a Curie temperature and a phase transition temperature of a martensitic to an austenitic phase comprising nickel, manganese, gallium and cobalt in a composition, is claimed. Magnetic shape memory alloy material with a Curie temperature and a phase transition temperature of a martensitic to an austenitic phase comprising nickel, manganese, gallium and cobalt in a composition of formula (Ni aMn bGa cCo dFe eCu f) (I), is claimed, where: the value of a-f is given in atom%; the value of d is adjusted so that the Curie temperature and the phase transition temperature is greater than 65[deg] C; and a molded body produced from the material exhibits a free magnetic-field-induced strain of greater than 0.1% to achieve a magnetic field-induced strain at a magnetic field impact of at most 2T at 65[deg] C. a : 44-51; b : 19-30; c : 18-24; d : 0.1-15; and e, f : 0-14.9, where d+e+f is = 15, and a+b+c+d+e+f is 100. An independent claim is included for a shape memory element, made from the material for use as an actuator element in an actuator and/or as a sensor element in a sensor.