Epitaxial growth and magnetic properties of half-metallic Fe3O4 on GaAs(100)

Y.X. Lu, J.S. Claydon, Y.B. Xu, S.M. Thompson, K. Wilson, G. van der Laan

Research output: Contribution to journalArticle

Abstract

The growth and magnetic properties of epitaxial magnetite Fe3O4 on GaAs(100) have been studied by reflection high-energy electron diffraction, x-ray photoelectron spectroscopy, magneto-optical Kerr effect, and x-ray magnetic circular dichroism. The epitaxial Fe3O4 films were synthesized by in situ post growth annealing of ultrathin epitaxial Fe films at 500K in an oxygen partial pressure of 5×10−5mbar. The XMCD measurements show characteristic contributions from different sites of the ferrimagnetic magnetite unit cell, namely, Fetd3+, Feoh2+, and Feoh3+. The epitaxial relationship was found to be Fe3O4(100)⟨011⟩∕∕GaAs(100)⟨010⟩ with the unit cell of Fe3O4 rotated by 45° to match that of GaAs(100) substrate. The films show a uniaxial magnetic anisotropy in a thickness range of about 2.0–6.0nm with the easy axes along the [011] direction of the GaAs(100) substrate.
Original languageEnglish
Article number233304
Number of pages4
JournalPhysical Review B
Volume70
Issue number23
DOIs
Publication statusPublished - 6 Dec 2004

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Magnetite
Epitaxial growth
Ferrosoferric Oxide
Magnetic properties
Optical Kerr effect
magnetic properties
X rays
magnetite
Reflection high energy electron diffraction
Magnetic anisotropy
Epitaxial films
Dichroism
Substrates
Photoelectron spectroscopy
Partial pressure
Annealing
Kerr effects
cells
high energy electrons
x ray spectroscopy

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Lu, Y. X., Claydon, J. S., Xu, Y. B., Thompson, S. M., Wilson, K., & van der Laan, G. (2004). Epitaxial growth and magnetic properties of half-metallic Fe3O4 on GaAs(100). Physical Review B, 70(23), [233304]. https://doi.org/10.1103/PhysRevB.70.233304
Lu, Y.X. ; Claydon, J.S. ; Xu, Y.B. ; Thompson, S.M. ; Wilson, K. ; van der Laan, G. / Epitaxial growth and magnetic properties of half-metallic Fe3O4 on GaAs(100). In: Physical Review B. 2004 ; Vol. 70, No. 23.
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Lu, YX, Claydon, JS, Xu, YB, Thompson, SM, Wilson, K & van der Laan, G 2004, 'Epitaxial growth and magnetic properties of half-metallic Fe3O4 on GaAs(100)', Physical Review B, vol. 70, no. 23, 233304. https://doi.org/10.1103/PhysRevB.70.233304

Epitaxial growth and magnetic properties of half-metallic Fe3O4 on GaAs(100). / Lu, Y.X.; Claydon, J.S.; Xu, Y.B.; Thompson, S.M.; Wilson, K.; van der Laan, G.

In: Physical Review B, Vol. 70, No. 23, 233304, 06.12.2004.

Research output: Contribution to journalArticle

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AU - Claydon, J.S.

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AU - Wilson, K.

AU - van der Laan, G.

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Lu YX, Claydon JS, Xu YB, Thompson SM, Wilson K, van der Laan G. Epitaxial growth and magnetic properties of half-metallic Fe3O4 on GaAs(100). Physical Review B. 2004 Dec 6;70(23). 233304. https://doi.org/10.1103/PhysRevB.70.233304