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Magnetic properties and amorphous-to-nanocrystalline transformation by thermal treatments in Fe84.3Si4P3B8Cu0.7 amorphous thin films

Magnetic properties and amorphous-to-nanocrystalline transformation by thermal treatments in Fe84.3Si4P3B8Cu0.7 amorphous thin films

Authors :
Gabriele Barrera
Marco Coïsson
Gianluca Fiore
Paola Rizzi
Federica Celegato
Paola Tiberto
Emauele Enrico
Patricio J. Viteri Villacis
Franco Vinai
Livio Battezzati
Publication Year :
2014

Abstract

Thin films of nominal composition Fe84.3Si4P3B8Cu0.7 have been prepared by sputtering from ribbons of the same alloy. Their microstructure has been studied by means of X-ray diffraction, differential scanning calorimetry and transmission electron microscopy, and reveals a partly amorphous state in the as-prepared samples. Their magnetic properties are soft and comparable to those measured on rapidly quenched ribbons. After annealing in furnace at temperatures up to 400 °C, their soft magnetic properties are improved thanks to the development of a fully nanocrystalline state. Annealing at higher temperature causes the coarsening of the α -Fe like grains, the development of hard magnetic phases and an increase of the coercive field.

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....aca40d01d31f3e116223dd86624508e5