' Correspondence and reprints.
~s m k :En priparant un composite conducteur polycarbonatelnoir de carbone, nous avons obtenu un nouveau materiau susceptible d'&tre utilise comme cathode pour la preparation electrolytique de recouwements metalliques. Ces cathodes sont comparees a des cathodes de Ppy depose sur polycarbonate. Nous dicrivons ici la realisation d'alliages magnetiques en couches minces. Ces alliages LanthanideslMCtaux de transition sont prepares en milieu organique (Formamide:FA) oh les cathodes constituees de films minces de polypyrrole conducteur ne sont plus utilisables. Le caractere metallique et amorphe de ces alliages est dCmontre par analyse RBS.
Mots cles:Polyrnere conducteur, dep6ts electrochimiques, alliage magnetique.
ABSTRACT:A new composite material prepared by mixing polycarbonate with carbon black has been tested as new kind of cathode. This material has been compared with a conducting polymer precipitated onto polycarbonate, both in aqueous and organic solutions. We report some examples of electrodeposition of magnetic alloys (Lanthanidesflransition metals) in Formamide. In this medium, the use of thin polypyrrole films cathodes had remained impossible. The preparation of amorphous and magnetic alloys onto PCIcarbon black is evidenced by RBS.
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