Journal
ULTRAMICROSCOPY
Volume 106, Issue 4-5, Pages 423-431Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultramic.2005.12.001
Keywords
transmission electron microscopy; Lorentz microscopy; transport of intensity equation; magnetic thin films; magnetic domains; magnetic domain walls
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Imaging of the magnetic structure of thin films by the Fresnel mode of Lorentz microscopy has been re-evaluated in terms of the Amperian current density within a sample. The conditions for which this imaging can be treated as linear are discussed for quantitative application. Additionally, the consequences for magnetic phase reconstruction using, the transport of intensity equation for defocused images are considered. While the range of applicability may initially appear rather limited examples of objects containing different spatial frequency components are used to illustrate the possibilities where relatively large defocus values may be used. (c) 2005 Elsevier B.V. All rights reserved.
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