FePt nanoparticles with a narrow composition distribution synthesized via pyrolysis of iron(III) ethoxide and platinum(II) acetylacetonate

Among many kinds of magnetic materials, L10-phase FePt shows almost the highest magnetic anisotropy resulting in high coercivity [1]. Thus, FePt has been intensively studied as material for magnetic recording media with a storage capacity of Tbit/in [2]. After the IBM group reported the synthesis of FePt nanoparticles (NPs) in liquid phase using iron pentacarbonyl [Fe(CO)5] and platinum(II) acetylacetonate [Pt(acac)2] as precursors [3], a lot of groups investigated advanced synthetic methods and applications of FePt NPs. FePt shows a high maximum energy product (BH)max of 13 MGOe [4]. Therefore, FePt NPs are also attractive materials for medical [5] or nanocomposite [6] applications. Additionally, FePt is a promising material as catalyst for fuel cells [7].