Structural and Magnetic Properties of Melt-Spun Ni-Mn(Fe)-Ga Ferromagnetic Shape Memory Ribbons

We studied structural and magnetic properties of Fe doped Ni
_2.15
Mn
_0.79
Fe
_0.06
Ga ferromagnetic shape memory ribbons prepared by a melt-spinning method. Experimental results obtained indicate that martensitic phase transition temperatures of the ribbon strongly depend on annealing, hence on the degree of atomic ordering. Magnetic hysteresis loop of the as-prepared ribbons shows a feature that can be attributed to the coexisting ferro and antiferromagnetic interactions.