Tuning the Curie temperature of Fe90Sc10 nanoglasses by varying the volume fraction and the composition of the interfaces

Fe90Sc10 nanoglass was produced by consolidating Fe90Sc10 glassy nanoparticles (GNp) into bulk solid material. The average diameters of the GNp, which were produced by inert gas condensation, decreased as He pressure decreased. The volume fraction of the interfaces within the nanoglass increased as the diameters of the primary GNp decreased. The segregation of the Fe atoms at the surfaces of the GNp varied, so the composition of the interfaces was different. As the Curie temperature of Fe90Sc10 nanoglass is primarily dependent on the volume fraction and the composition of the interfaces, the Curie temperature increased as He pressure decreased. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.