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Mapping the Magnetic Coupling of Self-Assembled Fe3O4 Nanocubes by Electron Holography
Lluís López-Conesa1,2,3, Carlos Martínez-Boubeta4,5, David Serantes6
1Laboratory of Electron Nanoscopies (LENS-MIND), Departament d'Enginyeria Electrònica i Biomèdica, Universitat de Barcelona, 08028 Barcelona, Spain.
Abstract:
The nanoscale magnetic configuration of self-assembled groups of magnetite 40 nm cubic nanoparticles has been investigated by means of electron holography in the transmission electron microscope (TEM). The arrangement of the cubes in the form of chains driven by the alignment of their dipoles of single nanocubes is assessed by the measured in-plane magnetic induction maps, in good agreement with theoretical calculations.

