High resolution transmission electron microscopy correlated to in-field Mössbauer spectrometry to investigate exchange coupling behavior and surface frustrated moments

Abstract In this work, we present a correlation between High Resolution Transmission Electron Microscopy (HRTEM) and in-field Mossbauer spectrometry to point out exchange coupling behavior, surface effects and chemical disorder in Co x Fe 3-x O 4 cobalt ferrite nanoparticles. The samples were synthesized by a solvothermal chemical route. The hysteresis loops, recorded by using Vibrating Sample Magnetometer (VSM), suggest a jump-like behavior nearby zero applied magnetic fields. The HRTEM micrographs illustrate the presence of faceted nanoparticles for x