Optimized synthesis and annealing conditions of L1₀FePt nanoparticles

Abstract

The fabrication of ∼3 nm FePt nanoparticles and detailed studies of the effect of the annealing conditions (temperature and time) on the formation of the face-centred tetragonal phase and on the magnetic properties are described. Additionally, the effect of the precursor molar ratio on the final product and the composition of the as-prepared samples were studied. The main criteria for the determination of the best alloy are the properties desired for applications in the field of magnetic recording media.

Phase controlled one-pot synthesis of heterostructured FePt–Fe3O4 nanocubes with excellent biocompatibility

“…Here, the chemically synthesized FePt NPs have a disordered structure and their ordered L10 structure can be obtained by an annealing process, but in the process of annealing, there is an occurrence of aggregation of particles, and the particle size is not uniform. 28 However, by the application of the ferrite phase to FePt, FePt/Fe 3 O 4 NPs can have excellent magnetic properties without a heat treatment. Moreover, these bimagnetic NPs function dually with two different materials sites for labeling, targeting, and binding with biomolecules.…”

Chemical synthesis of L1 Fe-Pt-Ni alloy nanoparticles

“…5,6 A plethora of techniques exist for the synthesis of FePt nanoparticles including coreduction of precursors, single source molecular precursors, and solid-state reactions. [7][8][9][10][11][12][13][14][15][16] However, few have considered ternary alloys with Fe and Pt. Most reports focus on the addition of a third element dopant keeping the stoichiometry between Fe and Pt fixed with the purpose of reducing ordering temperature.…”

Colloidal syntheses of FePt nanoparticles

“…Larger volumes of product could potentially be produced by physical methods such as ball milling [23] and pulsed plasma chemical vapour [24][25][26][27] which could be commercially attractive. However to remain concise, these methods will not be described in depth and the reader is referred to the relevant literature [2,25,[29][30][31][32][33][34][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63]. In addition, surface modifications of colloidal nPs during or after the synthesis are relatively easily achievable and provide numerous opportunities to combine additional but essential functionalities to fit specific applications.…”