Reordering kinetics and magnetic properties of mechanically disordered nanocrystalline L1[sub 2]-type Ni[sub 3]Al + Fe alloys
- Domaine Univ., St Martin d'Heres (France). Inst. National Polytechnique de Grenoble
The paramagnetic disordered high temperature states of L1[sub 2] or [gamma][prime]-type Ni[sub 3]Al-Fe alloys become ferromagnetic at low temperatures if retained in metastable disordered ([gamma]) state. Using mechanical attrition (milling) which also transforms the material into nanocrystalline form, various Ni[sub 3]Al-Fe alloys have been prepared in metastable-[gamma] form and their magnetizations M([gamma]) and M([gamma][prime]) and Curie temperatures [Tc] ([gamma]) and [Tc]([gamma][prime]) measured. Fe atoms possess a giant magnetic moment in these alloys and polarize neighboring Ni atoms but this polarization effect is lower in the disordered state due to a lower number of Fe-Ni nearest neighbors resulting in M([gamma])
- OSTI ID:
- 6189982
- Journal Information:
- Acta Metallurgica et Materialia; (United States), Vol. 41:5; ISSN 0956-7151
- Country of Publication:
- United States
- Language:
- English
Similar Records
Kinetic Ising model in an oscillating field: Avrami theory for the hysteretic response and finite-size scaling for the dynamic phase transition
Time-resolved synchrotron x-ray diffraction studies of the crystallization of amorphous Co(80-x)FexBâ‚‚â‚€