Optical magnetic circular dichroism in threshold photoemission from a magnetite thin film

K. Hild, J. Maul, T. Meng, M. Kallmayer, G. Schönhense, H. J. Elmers, Rafael Enrique Ramos Amigo, S. K. Arora, I. V. Shvets

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Abstract

Threshold photoemission excited by polarization-modulated ultraviolet femtosecond laser light is exploited for phase-sensitive detection of magnetic circular dichroism (MCD) for a magnetite thin film. Magnetite (Fe 3O4) shows a magnetic circular dichroism of ∼(4.5 0.3) × 10-3 for perpendicularly incident circularly polarized light and a magnetization vector switched parallel and antiparallel to the helicity vector by an external magnetic field. The asymmetry in threshold photoemission is discussed in comparison to the magneto-optical Kerr effect. The optical MCD contrast in threshold photoemission will provide a basis for future laboratory photoemission studies on magnetic surfaces.

Original languageEnglish
Article number235218
JournalJournal of Physics Condensed Matter
Volume20
Issue number23
DOIs
Publication statusPublished - 2008 Jun 11
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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    Hild, K., Maul, J., Meng, T., Kallmayer, M., Schönhense, G., Elmers, H. J., Ramos Amigo, R. E., Arora, S. K., & Shvets, I. V. (2008). Optical magnetic circular dichroism in threshold photoemission from a magnetite thin film. Journal of Physics Condensed Matter, 20(23), [235218]. https://doi.org/10.1088/0953-8984/20/23/235218