Visualization of vortex core polarity in NiFe nanodots by tilted Fresnel images.

@article{Ngo2011VisualizationOV,
  title={Visualization of vortex core polarity in NiFe nanodots by tilted Fresnel images.},
  author={Duc-The Ngo and Stephen McVitie},
  journal={Ultramicroscopy},
  year={2011},
  volume={111 8},
  pages={1276-85}
}
We illustrate an approach which allows determining the out-of-plane component of the vortex core (polarity) in NiFe nanodots using Fresnel imaging in Lorentz electron microscopy. Using tilted Fresnel images, contribution of the polarity is introduced into the Fresnel image. However, this contribution is relatively small and a difference image from two… CONTINUE READING