Controlling the Magnetic Properties of Fe-Based Composite Nanoparticles |
| O. Polit, M.S. Shakeri, Z. Swiatkowska-Warkocka
Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland |
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| We present FexOy composite particles prepared by pulsed laser irradiation of α-Fe2O3 nanoparticles dispersed in ethyl acetate and irradiated using a laser beam in the ultraviolet range with a wavelength of 355 nm. The sizes of particles and composition were controlled by tuning the laser parameters, such as laser fluence and irradiation time. We showed the evolution of the composition through X-ray diffraction measurements. Reactive bond molecular dynamics simulation results show bond breaking/formation during the synthesizing process. We examined the magnetic properties of the particles and showed that coercivity can be changed by the composition of particles and by increasing or decreasing particle size. The choice of systems built of iron and iron oxides made it possible to introduce the exchange bias effect into a range of magnetic properties of synthesized particles. |
DOI:10.12693/APhysPolA.145.139 topics: composite particles, laser synthesis, molecular dynamics, magnetic properties |