Shaw, J.
and Falco, C.
(2007),
Structure, spin-dynamics, and magnetic properties of annealed nanoscaled Fe layers on GaAs, Journal of Applied Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32408
(Accessed November 21, 2024)
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Structure, spin-dynamics, and magnetic properties of annealed nanoscaled Fe layers on GaAs
Published
Author(s)
, Charles M. Falco
Abstract
We performed a detailed study of the effect of annealing (at temperatures up to 300°C) on 0.2-3.0 nm thick epitaxial Fe layers deposited on GaAs(001). Using Brillouin light scattering, we studied the magnetic properties and spin dynamics of these layers and find a strong correlation between magnetic properties and the structure and chemical properties, as measured with electron diffraction, scanning tunneling microscopy, and x-ray photoemission spectroscopy. We found that significant changes in crystallinity and microstructure occur with annealing. Specifically, annealing of the thinnest layers results in the formation of a discontinuous magnetic layer with increased crystal order. At slightly larger thicknesses, faceted pits form in the Fe layer. This change in structure results in an earlier transition to a ferromagnetic phase, the creation of an additional higher frequency spin-wave mode, and a reduction in the magnetic uniaxial anisotropy constant.Citation
Journal of Applied Physics
Volume
101
Pub Type
Journals
Download Paper
Keywords
epitaxy, magnetic, spin-dynamics
Citation
Issues
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Created February 1, 2007, Updated October 12, 2021