RAPID LOSS OF MAGNETIC ORDER IN NI ON ALLOYING WITH CR, MO, RE, AND SI

In this article, the variation of the Curie temperature T-c and the ma gnetic moment mu of Ni in the fcc alloys Ni(1-x)M(x) (M=CR, Mo, Re, an d Si) are reported for concentrations x between 0 and 15 at. %. The de crease of T-c and mu with x reported earlier for NiCr alloys are also observed for the NiMo, NiRe, and NiSi alloys. The initial rates of dec reases are about 60 K/at. % for T-c and 0.05 mu(B)/at. % for mu, leadi ng to critical concentration x(c) similar or equal to 13% above with f erromagnetism disappears. Qualitatively, these decreases may be unders tood in terms of transfer of outer shell electrons of M atoms to the 3 d down arrow band of Ni in the alloys. However, quantitative calculati on of x(c) is not yet available. (C) 1996 American Institute of Physic s.