PAMS Seminar: "A Study of Bimagnetic CoO/NiFe2O4 Heterostructured Nanoparticles" by Sharif Uddin (PAMS student)

Sharif Uddin (PAMS student)

Abstract:
Bimagnetic nanoparticles show promise for applications in energy efficient magnetic storage media and magnetic device applications. The magnetic properties, including the exchange bias, of nanostructured materials can be tuned by variation of the size, composition, and morphology of the core vs overlayer of the nanoparticles (NPs). The purpose of this study is to investigate the optimal synthesis routes, structure and magnetic properties of CoO/NiFe2O4 heterostructured nanoparticles (HNPs). The nanoparticles are formed by synthesis of an antiferromagnetic CoO core and deposition of a ferrimagnetic NiFe2O4 overlayer. The CoO core NPs are prepared using thermal decomposition of Co(OH)2 at 600 °C for 2 hours in pure argon atmosphere, whereas the HNPs are obtained using a thermal evaporation method. The structural and morphological characterization, performed using XRD and SEM techniques, will be discussed.

Free