Abstract
The influence of magnetism on atomic short range order is shown in a single crystalline FeAl{sub 19.5} at % alloy in the disordered phase. The short range order has been measured in the paramagnetic state between 973 and 1 573 K on D7 at ILL through neutron diffuse scattering in the (110) plane. The effective pair interaction potentials V{sub 1}, V{sub 2}, V{sub 3} and V{sub 5} are calculated through an invers cluster variation method. The results are compared to those obtained through X-ray diffuse scattering on the same alloy frozen in the ferromagnetic order state at 772 K. The effect of magnetic coupling on the atomic order is the most important on the 1st effective potential, which is smaller in the ferromagnetic phase than in the paramagnetic one by about a factor of 2. 16 refs.; 9 figs.; 2 tabs.
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