Laser‐Assisted Growth of Fe3O4 Nanoparticle Films on Silicon Substrate in Open Air

This work presents a growth of Fe 3 O 4 nanoparticle films on silicon substrate. The iron oxide is deposited applying a pulsed laser deposition technique. The process is performed in open air in the absence and presence of external magnetic field. In fact, the morphologies of the obtained Fe 3 O 4 –Si samples are similar. The Fe 3 O 4 nanoparticles are spherical with average diameters of 30 nm and are densely agglomerated on the Si substrate. The Fe 3 O 4 –Si material prepared in the absence of magnetic field has revealed more intense signals during X‐ray diffraction and Raman measurements. The magnetic investigations indicate that the Fe 3 O 4 nanoparticles are significantly coupled with the Si substrate and do not exhibit superparamagnetic behavior. Moreover, the Verwey transition is 98 K for both investigated Fe 3 O 4 –Si samples.