Reflectance anisotropy spectroscopy of magnetite (110) surfaces

K. Fleischer, R. Verre, O. Mauit, R. G S Sofin, L. Farrell, C. Byrne, C. M. Smith, J. F. McGilp, I. V. Shvets

Research output: Contribution to journalArticle

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Abstract

Reflectance anisotropy spectroscopy (RAS) has been used to measure the optical anisotropies of bulk and thin-film Fe3O4(110) surfaces. The spectra indicate that small shifts in energy of the optical transitions, associated with anisotropic strain or electric field gradients caused by the (110) surface termination or a native oxide layer, are responsible for the strong signal observed. The RAS response was then measured as a function of temperature. A distinct change in the RAS line-shape amplitude was observed in the spectral range from 0.8 to 1.6 eV for temperatures below the Verwey transition of the crystal. Finally, thin-film magnetite was grown by molecular beam epitaxy on MgO(110) substrates. Changes in the RAS spectra were found for different film thickness, suggesting that RAS can be used to monitor the growth of magnetite (110) films in situ. The thickness dependence of the RAS is discussed in terms of various models for the origin of the RAS signal.

Original languageEnglish
Article number195118
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number19
DOIs
Publication statusPublished - May 13 2014

Fingerprint

Ferrosoferric Oxide
Magnetite
magnetite
Anisotropy
Spectroscopy
reflectance
anisotropy
spectroscopy
Optical anisotropy
Thin films
Optical transitions
Molecular beam epitaxy
Oxides
thin films
Film thickness
optical transition
line shape
Electric fields
film thickness
molecular beam epitaxy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Reflectance anisotropy spectroscopy of magnetite (110) surfaces. / Fleischer, K.; Verre, R.; Mauit, O.; Sofin, R. G S; Farrell, L.; Byrne, C.; Smith, C. M.; McGilp, J. F.; Shvets, I. V.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 19, 195118, 13.05.2014.

Research output: Contribution to journalArticle

Fleischer, K, Verre, R, Mauit, O, Sofin, RGS, Farrell, L, Byrne, C, Smith, CM, McGilp, JF & Shvets, IV 2014, 'Reflectance anisotropy spectroscopy of magnetite (110) surfaces', Physical Review B - Condensed Matter and Materials Physics, vol. 89, no. 19, 195118. https://doi.org/10.1103/PhysRevB.89.195118
Fleischer, K. ; Verre, R. ; Mauit, O. ; Sofin, R. G S ; Farrell, L. ; Byrne, C. ; Smith, C. M. ; McGilp, J. F. ; Shvets, I. V. / Reflectance anisotropy spectroscopy of magnetite (110) surfaces. In: Physical Review B - Condensed Matter and Materials Physics. 2014 ; Vol. 89, No. 19.
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