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Physical Review B (Condensed Matter and Materials Physics) -- February 15, 1998 -- Volume 57, Issue 8 pp. 4747-4755

Temperature- and rate-dependent RHEED oscillation studies of epitaxial Fe(001) on Cr(001)

K. Theis-Bröhl, I. Zoller, P. Bödeker, T. Schmitte, and H. Zabel

Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany

L. Brendel, M. Belzer, and D. E. Wolf

Institut für Theoretische Physik, Gerhard-Mercator-Universität-GH-Duisburg, D-47048 Duisburg, Germany

(Received 10 June 1997; revised 14 October 1997)

Reflection high-energy electron diffraction (RHEED) intensity studies were performed during the growth of thin Fe layers on vicinal Cr(001)/Nb(001)/Al₂O₃(102) substrates. The results are compared with those of recent molecular-beam epitaxy (MBE) growth models. General agreement is found as concerns the linear relationship between the logarithm of the number of RHEED oscillations and the inverse growth temperature. In agreement with theory the RHEED oscillation damping time is found to depend algebraically on the growth rate. However, contrary to expectations, the RHEED oscillations vanish faster at higher growth temperatures and lower growth rates. This behavior can be explained by a change in the growth mode from layer-by-layer to step flow. Numerical simulations in which step bunch melting during the Fe growth on the Cr buffer is assumed reproduce well the present experimental results. ©1998 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v57/p4747
PACS: 61.10.-i, 61.14.Hg, 61.16.Ch, 68.35.Fx        Additional Information

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Citing Articles

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   V. M. Uzdin et al., Phys. Rev. B 63, 104407 (2001)
2. Spin-resolved off-specular neutron scattering maps from magnetic multilayers using a polarized ³He gas spin filter
   B. Nickel et al., Rev. Sci. Instrum. 72, 163 (2001)
3. Spin-density waves and reorientation effects in thin epitaxial Cr films covered with ferromagnetic and paramagnetic layers
   P. Bödeker et al., Phys. Rev. B 59, 9408 (1999)
4. Reorientation of Spin Density Waves in Cr(001) Films Induced by Fe(001) Cap Layers
   P. Bödeker et al., Phys. Rev. Lett. 81, 914 (1998)