Site occupancy of Fe in ternary Ni<SUB>75-x</SUB>Fe<SUB>x+y</SUB>Al<SUB>25-y</SUB> alloys

The results of a detailed structural and magnetic study clearly indicate that regardless of the thermal history of the samples, Fe has a strong preference for the Ni sites in Ni-poor (nonstoichiometric) Ni75Al25 alloys. Fe substitution has a profound effect on the nature of magnetism in Ni25Al25

Magnetic properties of Ni<SUB>75-x</SUB>Fe<SUB>x</SUB>Al<SUB>25</SUB> alloys: effect of site disorder

The effect of site disorder and Fe substitution on the magnetic properties of Ni75-xFexAl25 alloys has been clearly brought out through an extensive magnetic investigation

Thermoelastic martensitic transformation in ferromagnetic Ni-Fe-Al alloys: effect of site disorder

Thermoelastic martensitic transformation from a face-centered-cubic austenite phase to tetragonal martensite phase has been established in a new ternary ferromagnetic alloy system Ni-Fe-Al ("prepared" in different states of site disorder) based on the results of a detailed neutron diffraction, electrical resistivity, and magnetization studies. Ordered (annealed) Ni55Fe20Al25 has a high Curie temperature TC&#x226B;300 K and an extremely wide temperature range over which martensite and austenite phases coexist. By comparison, site-disordered (quenched) Ni55Fe20Al25 has a lower TC (=225 K), higher ductility (shape memory effect), higher saturation magnetization, and a very well-defined martensitic transformation around TC