Shape-controlled synthesis and magnetic properties of FePt nanocubes

In this research, FePt nanocubes, octapods and polyhedra were successfully prepared with Mo(Co)6 as a reducing agent. The chemically-synthesized cubic FePt nanoparticles could easily be self-assembled into an oriented nanoarray. These ordered nanomagnet arrays were expected to achieve high-density information storage and high performance in permanent magnets. The self-assembed FePt nanocubes were chemically disordered with a face centered cubic (fcc) structure. During annealing, these particles changed to a face-centered tetragonal (fct) order. The phase structure, the micro-morphology and magnetic properties were characterized by using X-ray diffraction (XRD), High resolution transmission electron microscope (HRTEM), Scanning electron microscope (SEM) and vibrating sample magnetometer (VSM).