论文信息 - Amorphous magnetic RE-Fe-Al alloys

Amorphous magnetic RE-Fe-Al alloys

Detail studies of the effects of rare-earth substitution on the magnetic properties of bulk amorphous hard magnetic Nd/sub 60/Fe/sub 30/Al/sub 10/ alloys were carried out. Amorphous ribbons of alloys RE/sub 60/Fe/sub 30/Al/sub 10/ (with RE=Nd,Sm,Gd and Dy) were prepared by melt-spinning at 30 m/s. As temperature increases, instead of just a simple transition from ferromagnetic state to paramagnetic state, these ribbons undergo a superparamagnetic stage that ranges over about 100 K. Ribbons of alloys RE/sub 60/Fe/sub 30/Al/sub 10/ with RE=Nd,Sm and Dy exhibit high values of coercivity (in MA/m) range at 4 K, while coercivity of ribbons of alloys with RE=Y and Gd remain low below 100 kA/m.

J. Ding | H. Kong | Yat Li | Lan Wang

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