Centre National De La Recherche Scientifique

Commissariat a L'energie Atomique

Université Paul Sabatier (Toulouse III)

Atg-Cygnet

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Lionel Presmanes

Philippe Tailhades

Jean-Louis Ouvrier-Buffet

Abel C Rousset

Jean-Pierre Bonino

Laurence Bouet

Corinne Bonningue

Patrick Langlade

Isabelle Pasquet

Pierre Imperinetti

Claire Vialle

Wilfried Rabaud

Bruno Mauvernay

Astrid Astier

Stephanie Capdeville

Stéphanie Capdeville

Corine Bonningue

The invention relates to the use of a material having a spinel ferrite/iron monoxide structure as a sensitive material in the form of a thin film for the bolometric detection of infrared radiation, the chemical composition of said structure, excluding doping agents that may be present, having empirical formula (I): (FeM)O, where x is strictly less than 1 and strictly greater than 0.75. The invention also relates to a bolometric device for infrared radiation detection and infrared imaging, comprising at least one sensor provided with a sensitive element in the form of a thin film as defined above.

Use of a combination of iron monoxide and spinel oxides as a sensitive material for detecting infrared radiation

The present invention relates to the use as a sensitive material in a thin layer for bolometric detection of infrared radiation, of a material having a spinel ferrite structure of chemical composition, ignoring doping agents if any are present, satisfying empirical formula I:FeMAO.The invention also provides a bolometric device for detecting infrared radiation or for infrared imaging, and including at least one sensor provided with a sensitive element in the form of a thin layer as defined above.

Use of spinel ferrites as sensitive material for bolometric infrared detector devices

Composite material for magnetooptic recording, comprising a thin layer deposited on a non-magnetic solid substrate. The said thin layer is a polycrystalline layer consisting of microcrystals having a structure of a vacant-site spinel ferrite, based on iron, cobalt and transition metals. By virtue of a particular process for producing the thin layers, enabling especially the size of the crystallites to be increased, it is possible to optimize the magnetic and magnetooptic properties and to obtain thin layers having, for example, a remanent Faraday rotation and a coercive field which are greater, respectively, than 1 degree per micron for the Faraday rotation and 1000 Oe for the coercive field.

Composite material for magnetooptic recording its preparation and its use

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Castanet-Tolosan, France

Lionel Presmanes