Skip to main content Accessibility help
×
Home

Comparison of Simulated and Experimental Order Parameters in FePt—II

  • Karen L. Torres (a1), Richard R. Vanfleet (a2) and Gregory B. Thompson (a1)

Abstract

Eight FePt thin film specimens of various thicknesses, compositions, and order parameters have been analyzed to determine the robustness and fidelity of multislice simulations in determining the chemical order parameter via electron diffraction (ED). The shape of the simulated curves depends significantly on the orientation and thickness of the specimen. The ED results are compared to kinematical scattering order parameters, from the same films, acquired from synchrotron X-ray diffraction (XRD). For the specimens analyzed with convergent beam electron diffraction conditions, the order parameter closely matched the order parameter as determined by the XRD methodology. However, the specimens analyzed by selected area electron diffraction conditions did not show good agreement. This has been attributed to substrate effects that hindered the ability to accurately quantify the intensity values of the superlattice and fundamental reflections.

Copyright

Corresponding author

Corresponding author. E-mail: gthompson@eng.ua.edu

References

Hide All
Ferrer, J.K., Johnson, M.T., Bentley, J. & Carter, C.B. (2005). Epitactic formation of forsterite on MgO single crystals during vacuum annealing. Surf Sci 587, 205218.
Giannuzzi, L.A., Drown, J.L., Brown, S.R., Irwin, R.B. & Stevie, F.A. (1998). Applications of the FIB lift-out technique for TEM specimen preparation. Microsc Res Techniq 41, 285290.
Inaba, Y., Torres, K.L., Cole, A., Vanfleet, R.R., Ott, R., Klemmer, T., Harrell, J.W. & Thompson, G.B. (2009). Thermal annealing of FePt thin films by millisecond plasma arc pulses. J Magn Magn Mater 321, 24512458.
Kirkland, E.J. (1998). Advanced Computing in Electron Microscopy. New York: Plenum.
MacGillavary, C.H., Rieck, G.D. & Lonsdale, K. (1962). International Tables for X-Ray Crystallography: Volume III. Birmingham, UK: Kynoch Press.
Torres, K.L. & Thompson, G.B. (2009). Grain boundary enrichment in the FePt polymorphic A1 to L10 phase transformation. Ultramicroscopy 109, 606611.
Torres, K.L., Vanfleet, R.R. & Thompson, G.B. (2011). Dynamical diffraction simulations in FePt—I. Microsc Microanal 17 (in press).
Warren, B.E. (1990). X-ray studies of order-disorder. In X-Ray Diffraction, pp. 208210. New York: Dover Publications.
Watanabe, M. & Williams, D.B. (2006). The quantitative analysis of thin specimens: A review of progress from the Cliff-Lorimer to the new ζ-factor methods. J Microsc 221, 89109.

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed