Effect of heat treatment on the properties of Co50Ni20Ga30 ferromagnetic shape memory alloy ribbons

X F Dai, H Y Wang, G D Liu, Y G Wang, X F Duan, J L Chen, G H Wu
2006 Journal of Physics D: Applied Physics  
The structure, magnetic properties and martensitic transformation behaviour were investigated for as-spun Co 50 Ni 20 Ga 30 ribbons under various heat-treatment conditions. When the as-spun ribbons were annealed at 400 • C, the saturation magnetization decreased from 49.5 to 40.1 emu g −1 and the coercivity increased from 18 to 2622 Oe, accompanied by the disappearance of the martensitic transformation. Re-treating the annealed sample at different temperatures from 600 to 1200 • C, the
more » ... ic transformation reoccurred and the T M was adjusted between 132 and 249 K.
doi:10.1088/0022-3727/39/14/002 fatcat:m2ln6gh3mzc3neumfqbavdmxnq