The magnetic decoupling and the transformation temperatures of metastable nanophases have been investigated as a function of annealing temperature in partially crystallized Fe73.5Si13.5B9Nb3Cu1 (Finemet) and Fe92-xBxZr7-yNbyCu1, with x = 2,4,6,8,10,12 and y = 0, 3.5 at% (Nanoperm) type nanostructured soft magnetic alloys. By comparative initial permeability (μi) and low field dc magnetization (Ms) measurements it is demonstrated that the nanograins show a superferro-superpara- and a superpara-para-magnetic transition at high temperatures, between the Curie points belonging to the starting amorphous and equilibrium bcc phases respectively, in both type of nanocrystalline alloys. We find that these transition temperatures depend on the annealing conditions.
|Number of pages||4|
|Publication status||Published - Jan 1 1999|
|Event||Proceedings of the 1998 4th International Conference on Nanostructured Materials (NANO '98) - Stockholm, Swed|
Duration: Jun 14 1998 → Jun 19 1998
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics