HYPERFINE FIELDS AND ELECTRONIC STRUCTURE OF CSCL-TYPE TERNARY ALLOYS OF FIRST TRANSITION SERIES

The Co59 Knight shift K and the Fe57 isomer shift have been measured in TiFe1-xCox alloys over most of the composition range 0≤x≤1. The experimental results are discussed in terms of correlations with electron concentration and s admixture in the d bands. At room temperature, K varies from a maximum of (3.2±0.2)% at xa0.8, and roughly follows the electronic specific heat as the composition is varied, with a minimum of K=(0.8±0.2)% near x=0. K increases substantially as the temperature is lowered for x near 1, and decreases somewhat for x near 0. The maximum K measured is (4.7±0.2)% for xa0.8 at 120a°K. The slopes of K versus susceptibility vary from +86a kGμB per formula unit for x=0.8 to -47a kGμB per formula unit for x=0.05. The isomer-shift variation, from -0.15±0.01 (mm/sec relative to pure Fe) at TiFe to -0.19±0.02 at TiCo, is similar to that of Fe in Cr-Mn. The Ti47,49 Knight shift in TiFe is (0.26±0.04)% at room and at liquid-nitrogen temperatures. © 1968 The American Physical Society.