Neutron diffraction study of Y(TiFeC)12

Abstract Structure measurements on the carbide Y(TiFeC) 12 prepared by arc-melting were carried out by means of powder neutron diffraction. Data analysis by profile technique showed that the carbon atoms occupy the 8i sites in the ThMn 12 type structure, substituting for some Fe atoms. The large electronegativity of carbon on the 8i sites explains the observed effect of carbon on the intrinsic magnetic properties of RTiFe 11 , which is completely different from that of the interstitial nitrogen.