Large Wave Vector Spin Waves and Dispersion in Two Monolayer Fe on W(110)

W. X. Tang, Y. Zhang, I. Tudosa, J. Prokop, M. Etzkorn, and J. Kirschner
Phys. Rev. Lett. 99, 087202 – Published 24 August 2007

Abstract

We present the first surface spin-wave (SW) dispersion measurements up to the surface Brillouin zone boundary of a two monolayer Fe film on W(110) by using spin-polarized electron energy loss spectroscopy. Pronounced features of SW peaks are observed in the spectra at room temperature. We found that the SW energies in the Fe film are strongly reduced compared to spin waves in bulk Fe and to theoretical predictions. Our results suggest that this reduction is caused by the reduction of exchange interaction within the 2 ML Fe on W(110) as compared to bulk Fe.

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  • Received 15 December 2006

DOI:https://doi.org/10.1103/PhysRevLett.99.087202

©2007 American Physical Society

Authors & Affiliations

W. X. Tang1,*, Y. Zhang1, I. Tudosa1, J. Prokop1, M. Etzkorn1,2, and J. Kirschner1

  • 1Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
  • 2Institut de Physique des Nanostructures, Ecole Polytechnique Fédéral de Lausanne, CH-1015 Lausanne, Switzerland

  • *Corresponding author. wtang@mpi-halle.mpg.de

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Vol. 99, Iss. 8 — 24 August 2007

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