NUKLEONIKA 2007, 52(Supplement 1):S43-46

MÖSSBAUER TEMPERATURE STUDY OF THE Fe80Nb6B14 AMORPHOUS ALLOY

Janusz E. Fr¹ckowiak, Adam Tomczyk, Aneta Hanc, Grzegorz Haneczok

Institute of Materials Science, University of Silesia, 4 Uniwersytecka Str., 40-007 Katowice, Poland

Temperature studies in the range 300-800 K of amorphous Fe80Nb6B14 alloy using Mössbauer spectroscopy are presented. It is shown that at a temperature close to 700 K iron clusters with non-collinear magnetic structure are formed. The observed magnetic permeability enhancement effect in the annealed at elevated temperatures alloy, which takes place in amorphous phase, is due to the strong ferromagnetic exchange between Fe clusters via the amorphous matrix and reduction of internal stresses.