Enhanced exchange-coupling effect in Nd-Fe-B/Fe-B nanocomposite magnet.
Soft phase magnetic Fe-B nanoparticles were prepared by coprecipitation and the hard phase magnetic Nd-Fe-B nanoparticles were obtained from mechanical ball mill of the bulk Nd-Fe-B with a shaker mill. Also mechanical ball mill technique was applied to the mixture of Nd-Fe-B and Fe-B nanoparticles to build up an exchange-coupled nanocomposite magnet. It was loaded in electronic furnace and annealed under a flow of hydrogen at 953 K for 30 min. The exchange coupled interaction of isotropic magnets was characterized by smooth hysteresis loop with a high value of remanence (Mr/Ms > 0.5).
Cha
Hyungil
H
Department of Chemistry, Sogang University Seoul 121-742, South Korea.
Kim
Changwoo
C
Ji
Eunsun
E
Kim
Younghwan
Y
Jadhav
Abhijit
A
Kang
Dongin
D
Kang
Youngsoo
Y