Nanoscale phase separation in Fe3O4(111) films on sapphire(0001) and phase stability of Fe3O4(001) films on MgO(001) grown by oxygen-plasma-assisted molecular beam epitaxy

R.F.C. Farrow; P. Rice; M.F. Toney; R.F. Marks; J.A. Hedstrom; R. Stephenson; M.J. Carey; A.J. Kellock

doi:10.1063/1.1556174

Journal of Applied Physics

Paper

16 Apr 2003

Nanoscale phase separation in Fe₃O₄(111) films on sapphire(0001) and phase stability of Fe₃O₄(001) films on MgO(001) grown by oxygen-plasma-assisted molecular beam epitaxy

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Abstract

A phase instability in oxygen-plasma-assisted molecular beam epitaxy of Fe3O4 films on sapphire (0001) substrates was investigated. Growth conditions were specified for which single-phase, epitaxial Fe3O4 (111) films can be grown by plasma-assisted molecular beam epitaxy. It was shown that single-phase Fe3O4 (111) films are more difficult to magnetize than Fe3O4 (001) films.

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