The magnetic properties and characterization of core/shell structured Au-coated Fe nanoparticles were investigated. The nanoparticles were synthesized by using a reverse micelle method through the reduction of an aqueous solution. The temperature dependence of the magnetization was found to exhibit a maximum at a blocking temperature of about 150 K. The presence of an α-Fe component and a broad distribution of local environments were showed by the Mössbauer spectroscopy. A negative giant magnetoresistance effect was found as the Fe cores served as scattering centers for the electrical transport.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)