An annealing technique based on electrical current heating is extended from the case of metallic ribbons to thin films, by taking into account the role of thermal dissipation played by the film substrate. It has been employed in order to study the evolution of the magnetic properties with increasing annealingcurrent intensity, and thus annealingtemperature, of amorphous Fe-Co-Nb-Si-P-B thin films. Results are compared with conventionally annealed samples, treated in furnace at similar temperatures. Joule heating turns out to be more effective in softening the magnetic properties of the studied alloy in thin film form, with respect to furnaceannealing. Additionally, Joule heating (performed at low current intensities) is able to promote the development of a spin reorientation transition in the studied film, which results in the appearance of a transcritical hysteresis loop and a dense stripe domain configuration.

Magnetic properties of current-annealed amorphous thin films / Coisson, Marco; Barrera, G; Celegato, F; Martino, L; Tiberto, PAOLA MARIA; Vinai, Franco; Allia, P.. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 112:5(2012), pp. 053910-1-053910-11. [10.1063/1.4748055]

Magnetic properties of current-annealed amorphous thin films

COISSON, MARCO;Barrera G;Celegato F;TIBERTO, PAOLA MARIA;VINAI, FRANCO;
2012

Abstract

An annealing technique based on electrical current heating is extended from the case of metallic ribbons to thin films, by taking into account the role of thermal dissipation played by the film substrate. It has been employed in order to study the evolution of the magnetic properties with increasing annealingcurrent intensity, and thus annealingtemperature, of amorphous Fe-Co-Nb-Si-P-B thin films. Results are compared with conventionally annealed samples, treated in furnace at similar temperatures. Joule heating turns out to be more effective in softening the magnetic properties of the studied alloy in thin film form, with respect to furnaceannealing. Additionally, Joule heating (performed at low current intensities) is able to promote the development of a spin reorientation transition in the studied film, which results in the appearance of a transcritical hysteresis loop and a dense stripe domain configuration.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/31169
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