The strengths of the Gd-Gd, Gd-Fe and Fe-Fe exchange couplings have been estimated from ordering temperatures for the amorphous Gd-T (T = Cu, Al and Fe) systems. The obtained Gd-Gd and Gd-Fe exchange interactions always increase with increasing Gd-concentration. These results are associated to the 5d-electron density. The Fe-Fe coupling, however, was discussed in terms of the negative interactions between the Fe-Fe pairs with the closest inter-atomic spacing. © 1998 Elsevier Science B.V. All rights reserved.

Danh T.M., Duc N.H., Thuy N.P.

Gửi cho bạn bè

Từ khóa : Amorphous alloys; Binary alloys; Carrier concentration; Gadolinium alloys; Exchange interactions; Hybridization; Magnetic materials