Image de science


© CNRS Photothèque/Martin Hytch © CNRS Photothèque/Martin Hytch

This image shows the magnetic field lines in Fe-Ni (iron-nickel) nanoparticles using electronic holography. The concentric circles of field lines correspond to the magnetic vortex formed in the central particle of 70 nm (1) in diameter. The colours indicate the local orientation of the field. The total width of the image is 140 nm. This research is the result of collaboration between France’s Centre d'Etudes de Chimie Métallurgique and the UK’s University of Cambridge.

  1. One nanometre (nm) equals one billionth of a metre.