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Structural and magnetic properties of magnetite-containing epitaxial iron oxide films grown on MgO(001) substrates

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1 Author(s)
Kado, T. ; National Institute of Advanced Industrial Science and Technology (AIST), Nanoelectronics Research Institute, Umezono 1-1-1, Central 2, Tsukuba, Ibaraki 305-8568, Japan

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The structural and magnetic properties of three kinds of Fe oxide films—Fe3O4, a berthollide type of Fe oxide, and a composite of Fe3O4 and FeO—grown on MgO(001) substrates epitaxially at 423 K by pulsed laser deposition were investigated by magnetoresistance measurement and grazing incidence x-ray diffraction. The Fe3O4 film had the largest negative magnetoresistance and the roughest film-substrate interface. The very close lattice matching of single-phase Fe3O4 and MgO facilitates the formation of antiphase boundaries due to natural growth defects and of a rough interface probably due to cation interdiffusion.

Published in:
Journal of Applied Physics  (Volume:103 ,  Issue: 4 )

Date of Publication: Feb 2008

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