Fe3O4 thin films with a thickness of about 140 nm have been deposited on MgO ~001! substrates by reactive sputtering. Microstructural studies indicated that monocrystalline Fe3O4 thin films were epitaxially grown on the MgO substrates with a cubic-on-cubic orientation relationship with respect to the substrates. Strain field due to slight lattice mismatch between the films and substrates was observed. The saturation moment and the coercivity for in-plane magnetization hysteresis loop were 235 emu/cc and 500 Oe, respectively. The lower saturation moment value of the Fe3O4 thin film suggested that the strain field may play a role in the reduction of magnetization. © 2004 American Institute of Physics.
Chen, Y. X.; Chen, C.; Zhou, W. L.; Wang, Z. J.; Tang, Jinke; Wang, D. X.; and Daughton, J. M. (2004). "Direct observation of strain fields in epitaxial growth Fe 3 O 4 thin films on MgO substrates." JOURNAL OF APPLIED PHYSICS 95.11, 7282-7284.