“…To the best of our knowledge, the measured coercivity values are the highest among those previously reported for Mn 3 O 4 films, , and similar (or slightly lower/higher) values have been obtained only in nanoparticles ,,,,, and nanowires/rods − ,,, where surface/interface and shape anisotropy, respectively, were indicated as the main factors responsible for the observed effects. In the present case, the high coercivity values could be traced back to the presence of microstructural defects (see the above-discussed XRD results) acting as pinning sites for domain wall motion. − This observation accounts for the highest coercivity being observed for the Mn 3 O 4 specimen synthesized under dry O 2 at 10.0 mbar, which presented the larger amount of microstructural defects, as indicated by structural analyses (see above).…”