Abstract
In this study, magnetic iron platinum alloy-core/gold-shell (FePt@Au) nanoparticles (NPs) were synthesized using the reverse micelle technique under ambient pressure at 25°C. Gold-coated NPs are prevented FePt oxidation and allowed the samples to be manipulated without additional precautions to prevent oxidation. FePt@Au NPs were successfully fabricated and demonstrated by X-ray diffractometry (XRD) and ultraviolet-visible absorption spectra. Transmission electron microscopy (TEM) reveals the average diameter of FePt@Au NPs is about 5.7 nm. The result of superconducting quantum interference device (SQUID) magnetometry shows it was super-paramagnetic, the blocking temperature and the coercive field of 26 K and 350 Oe, respectively.
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