Effect of Site Disorder on Martensitic Transformation in Ferromagnetic Ni55Fe20Al25 Alloy as Inferred from Magnetic and Magneto-Transport Measurements

A.C. Abhyankar; B. Annie D'Santhoshini; S.N. Kaul; A.K. Nigam

doi:10.4028/www.scientific.net/AMR.52.77

Paper Titles

Intermartensitic Transformations in Ni-Mn-Ga Alloys: A General View
p.47

Martensite Transformation and Magnetic Property Dependence on the Annealing Temperature in Ni-Rich Ni-Mn-Ga Alloy
p.57

Influence of Annealing Temperature on the Properties of Co-Ni-Ga Ferromagnetic Shape Memory Alloy
p.63

Textural Ordering in NiTi, Ni-Fe-Ti, and Ni-Mn-Ga Shape Memory Alloys - Kinetics of Intra- and Inter-Domain Processes
p.69

Effect of Site Disorder on Martensitic Transformation in Ferromagnetic Ni₅₅Fe₂₀Al₂₅ Alloy as Inferred from Magnetic and Magneto-Transport Measurements
p.77

Acoustic Energy Absorption in Ferromagnetic Ni-Mn-Ga Shape Memory Alloy Polymer Composites
p.87

Co-Ni-Ga Alloys with Room Temperature Ferromagnetic Martensite Phase
p.95

Structural Characterization of Co_70-xNi_xGa₃₀ Ferromagnetic Shape Memory Alloys
p.103

Structural Studies on Mn Excess and Ga Deficient Ni-Mn-Ga
p.109

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 52Effect of Site Disorder on Martensitic...

Effect of Site Disorder on Martensitic Transformation in Ferromagnetic Ni₅₅Fe₂₀Al₂₅ Alloy as Inferred from Magnetic and Magneto-Transport Measurements

Abstract:

Neutron diffraction technique is used to identify the crystal structures and study the phase transformation in a ternary Ni55Fe20Al25 alloy, prepared in the ordered and site-disordered states by annealing and rapid-melt-quenching techniques. We report the observation of ‘step-like’ wavy structures in the thermomagnetic curves taken on ordered samples. No such features are observed in the site-disordered counterparts. Negative magnetoresistance at 10 K and in a magnetic field of 80 kOe in the disordered sample is nearly two times larger than that in the annealed sample. A tentative explanation for these phenomena is given.