LOCAL MAGNETIC-MOMENTS IN THE (FE1-XNIX)(4)N LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.6) COMPOUNDS

Mossbauer and magnetic measurements have been performed on the single- phase gamma'-Fe4N and (Fe1-xNix)(4)N compounds. The local magnetic mom ents of iron and nickel atoms are evaluated by combining hyperfine fie lds and saturation magnetizations of (Fe1-xNix)(4)N compounds. The res ults confirm that the average magnetic moment per iron atom slightly d ecreases with increasing nickel content in (Fe1-xNix)(4)N compounds. T he average magnetic moment per nickel atom is approximately 0.3 and 0. 9 mu(B) for face centre sites and cubic corner sites, respectively.