Temperature dependence of the magnetization in Fe islands on W(110): evidence for spin-wave quantization

Details Temperature dependence of the magnetization in Fe islands on W(110): evidence for spin-wave quantization Temperature dependence of the magnetization in Fe islands on W(110): evidence for spin-wave quantization

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003njph....5...47s&link_type=abstract

New Journal of Physics, Volume 5, Issue 1, pp. 47 (2003).

Physics

9

Scientific paper

We have measured the temperature dependence of the magnetic hyperfine field in Ag-coated Fe(110) islands on W(110) between 4 and 300 K using nuclear resonant scattering of synchrotron radiation. The decay of the spontaneous magnetization of the islands with increasing temperature differs distinctly from the bulk characteristics and is not described by a simple Bloch's T3/2 law. The deviation is attributed to quantization of spin-waves as a result of geometric confinement in the islands. The data can be explained assuming an effective energy gap in the spin-wave spectrum of ΔE = 6.7±1 meV.

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