The low-temperature magnetic behavior of ball-milled nanocrystalline Fe is reported. The results of dc and ac susceptibility, remanence, and magnetic relaxation measurements indicate a transition from a high-temperature ferromagnetic state to a low-temperature disordered regime, where a collective freezing of the crystallites magnetic moments occurs. It is proposed that the behavior is determined by the presence of the structurally disordered grain boundaries, showing spin-glass-like properties.

Disordered magnetism at the grain boundary of pure nanocrystalline Iron

DEL BIANCO, Lucia
Secondo
;
1999

Abstract

The low-temperature magnetic behavior of ball-milled nanocrystalline Fe is reported. The results of dc and ac susceptibility, remanence, and magnetic relaxation measurements indicate a transition from a high-temperature ferromagnetic state to a low-temperature disordered regime, where a collective freezing of the crystallites magnetic moments occurs. It is proposed that the behavior is determined by the presence of the structurally disordered grain boundaries, showing spin-glass-like properties.
E., Bonetti; DEL BIANCO, Lucia; D., Fiorani; D., Rinaldi; R., Caciuffo; A., Hernando
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2331609
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