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Magnetic coupling in the Gd-T intermetallics (T-Fe, Co)

Using the strength of the Gd-Gd interactions, deduced in different Gd-T intermetallics from the ordering temperature of GdNi2, the Gd-T exchange coupling parameter (AGdT) of the RmTn (T=Fe or Co; m/n=1/2;1/3;6/23;1/5 and 2/17) and RmTnAk (A=metalloids and other metals; m/n/k=1/4/1; 2/14/1; 1/11/1 and 1/10/2) systems has been evaluated from analysis of the Curie temperature. Going from T-poor to T-rich compounds, a tendency to decrease is found for both AGd=Co and AGd=Fe; these variations are compared with those observed in the exchange parameters ACo=Co and AFe=Fe. © 1992.

 Duc N.H., Hien T.D., Givord D.
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  Từ khóa : Intermetallics; Magnetic Materials; Curie Temperature; Magnetic Coupling; Gadolinium Compounds