Advanced Materials: TechConnect Briefs 2015Advanced Materials TechConnect Briefs 2015

Nanoparticle Synthesis & Applications Chapter 5

Magnetic exchange bias effect in Manganese Oxide Core-Shell Nanoparticles fabricated by inert gas condensation technique

F.A. Khan, M. Bah, S.I. Shah
Department of Physics, Bangladesh University of Engineering and Technology(BUET), Bangladesh

pp. 325 - 327

Keywords: manganese oxide nanoparticles, core-shell structure, SEM, HRTEM

Manganese oxide core-shell nanoparticles are fabricated by inert gas condensation technique. The as deposited samples are found to be amorphous in nature with random distribution of clustered particles. X-Ray Diffraction (XRD) and High Resolution Transmission Electron Microscopy (HRTEM) studies on selected areas revealed the existence of a core-shell type structure with the core mainly consisting of MnO which is antiferromagnetic (AFM) and the shell being ferimagnetic(FiM) Mn2O3 and Mn3O4 . The observed Neel temperature (Tn) is around 143K and the ferrimagnetic Tc is around 42K (Tc