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Couches minces de ferrites spinelles à propriétés semiconductrices destinées à la réalisation de microbolomètres

Abstract : The elaboration conditions of highly subtituted zinc ferrites thin films were studied in order to evaluate their possible integration as thermometer in microbolometer devices. RF sputtering appeared to be equivalent to both a high temperature and a low oxygen pressure treatment. Some reduction phenomena such as the formation of a wustite-like iron-zinc oxide, were limited by carefully selecting the elaboration conditions. However, the deposited ferrites were oxygen deficient and had an unexpected high Curie temperature. The evolution of the film porosity according to the deposition parameters was established. The spectroscopic impedance measurements revealed that the electrical conduction was controled by the intergranular areas; their resistivity increasing with the films porosity. The air annealings and the magnetic order changes, also permitted to modify the thin films electrical properties.
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https://tel.archives-ouvertes.fr/tel-00009540
Contributor : Stéphanie Capdeville <>
Submitted on : Monday, June 20, 2005 - 4:33:15 PM
Last modification on : Friday, January 10, 2020 - 9:08:21 PM
Long-term archiving on: : Friday, September 14, 2012 - 1:25:46 PM

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  • HAL Id : tel-00009540, version 1

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Stéphanie Capdeville. Couches minces de ferrites spinelles à propriétés semiconductrices destinées à la réalisation de microbolomètres. Matériaux. Université Paul Sabatier - Toulouse III, 2005. Français. ⟨tel-00009540⟩

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