LINE PROFILES IN NUCLEAR MAGNETIC RESONANCE AND MOSSBAUER EFFECT OF TIFE 1-XCOX ALLOYS

The 57Fe Mössbauer effect (ME) and the 59Co nuclear magnetic resonance (NMR) have been investigated as a function of alloy concentration, temperature, and stoichiometry in TiFe1-xCo x alloys over most of the range 0≤x≤1. At room temperature, in carefully prepared samples, a single 57Fe ME line was observed for all values of x. This line broadened somewhat at low temperatures, although the magnetic properties of these alloys would have led one to expect a larger broadening at certain compositions. The 69Co NMR linewidth was narrowest for x close to 0 or 1 and was a strong function of x as well as of temperature and magnetic field. The intermediate compositions displayed resolved satellite structures. Annealing reduced both the ME and NMR linewidths. Deviations from stoichiometry and internal oxidation were readily observable from their effect on the ME line profile. Comparisons are made with TiFe 2 and stainless steel ME spectra. Both the ME and NMR results for TiFe1-xCox are consistent with a CsCl structure over the entire composition range. The NMR results indicate a lack of atomic ordering on the Co, Fe sublattice. © 1968 The American Institute of Physics.