Structure and magnetic properties of nanostructured Tb(Mn1−T )6Sn6 (T=Fe, Co and Ni) melt spun ribbons

Abstract Structural evolution, Curie temperature (TC) and magnetic properties of nanostructured Tb(Mn1−yTy)6Sn6 (T=Fe, Co and Ni) melt spun ribbons have been investigated. It is found that 1:6:6 phase may persist if the substituted fraction of Fe, Co and Ni elements for Mn is less than 75%, 50% and 25%, respectively. The coercivity (iHc), remanence (σr) and TC of the above ribbons mostly decrease with the increase of Co or Ni substitution. However, the remanence (σr) of the ribbons is improved by the increase of Fe content from 10.6 emu/g for TbMn6Sn6 to 12.7 emu/g for Tb(Mn0.5Fe0.5)6Sn6. Furthermore, TC of the 1:6:6 phase is increased from 155.3 °C for ternary TbMn6Sn6 to 169.2 °C for Tb(Mn0.92Fe0.08)6Sn6.