Microstructure and magnetic properties of amorphous Fe51Co12Si16B8Mo5P8 alloy

Fe-based metallic glasses such as FINEMET, NANOPERM and HITPERM usually produced from amorphous precursors in various forms have been intensively studied over the past thirty years, because these materials exhibit a unique combination of soft magnetic properties [1], which is very interesting from a scientifi c point of view. The application of these materials at elevated temperatures is determined by their appropriate magnetic parameters, e.g. Curie point, coercive fi eld, saturation magnetization, etc. The latter can be enhanced by partially replacing Fe atoms by Co in the master alloy [2, 3]. Their excellent magnetic properties make them ideal for the electrical industry, e.g. as transformers and magnetic chokes [4]. A new group of NANOMET (Fe-Si-B-P-Cu) soft magnetic materials was developed by Makino [5, 6] as a suitable candidate for energy saving. It is currently a focus of many research groups that are struggling to explain and understand the consequences of structural changes upon their magnetic properties. The aim of this paper is to study the evolution of the microstructure and soft magnetic properties of a novel Fe51Co12Si16B8Mo5P8 alloy in as-quenched and annealed (below the crystallization temperature) states. Microstructure and magnetic properties of amorphous Fe51Co12Si16B8Mo5P8 alloy Mariusz Hasiak, Marcel Miglierini, Narges Amini, Marek Bujdoš