NMR Study of Ordered and Disordered Fe-Co Alloy

Abstract

The 59 Co NMR has been observed in the ordered and disordered Fe-Co alloys with 48, 50 and 52 at% Co. Analysing the positions of satellite lines, the effect of first, second and third nearest neighbor atoms on the hyperfine field at a Co nucleus is discussed in terms of an empirical equation, H Co = a µ co + b 1 Σ µ 1n + b 2 Σ µ 2n + b 3 Σ µ 3n . Using the estimated values of the parameters a , b 1 , b 2 and b 3 , the spectra of Fe 50 Co 50 alloys with various ordering parameters were calculated and found to be in good agreement with the observed spectra.