We have studied the magnetic properties of a sample obtained by high-energy mechanical milling from a ferromagnetic FeSiB amorphous ribbon. The milled material mainly consists of a Fe-based amorphous matrix embedding a minor fraction of a-Fe nanocrystallites (~23%) and magnetization dynamics effects characterize the magnetic behavior. In particular, a magnetic transition occurs at T ~ 50 K, from a low temperature disordered collective frozen state, similar to a spin-cluster-glass, to a high temperature regime where ferromagnetism predominates. The phenomenon has been ultimately ascribed to the local modification of the interatomic distance distribution in the amorphous matrix, induced by milling.

Changing the magnetism of amorphous FeSiB by mechanical milling

DEL BIANCO, LUCIA;BONETTI, ENNIO;
2010

Abstract

We have studied the magnetic properties of a sample obtained by high-energy mechanical milling from a ferromagnetic FeSiB amorphous ribbon. The milled material mainly consists of a Fe-based amorphous matrix embedding a minor fraction of a-Fe nanocrystallites (~23%) and magnetization dynamics effects characterize the magnetic behavior. In particular, a magnetic transition occurs at T ~ 50 K, from a low temperature disordered collective frozen state, similar to a spin-cluster-glass, to a high temperature regime where ferromagnetism predominates. The phenomenon has been ultimately ascribed to the local modification of the interatomic distance distribution in the amorphous matrix, induced by milling.
2010
L. Del Bianco; F. Spizzo; M. Tamisari; E. Bonetti; F. Ronconi; D. Fiorani
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/90869
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