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Nature 450, 177-178 (8 November 2007) | doi:10.1038/450177a; Published online 7 November 2007

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Materials science: Magnetic blue

Jeroen van den Brink1 & Alberto F. Morpurgo2

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A commonly used blue dye is more than just a pretty colour. This material and its relatives are semiconductors, and their magnetic properties can be controlled by engineering their crystal structure.

Organic compounds are rarely magnetic, but metal phthalocyanine (MPc) materials are notable exceptions to this rule. Reporting in Advanced Materials, Heutz et al.1 now show that the magnetism of MPcs can be controlled.

  1. Jeroen van den Brink is at the Instituut-Lorentz for Theoretical Physics, Leiden University, Postbus 9506, 2300 RA Leiden, the Netherlands.
    Email: brink@ilorentz.org
  2. Alberto F. Morpurgo is at the Kavli Institute of Nanoscience, Delft University of Technology, Postbus 5, 2600 AA Delft, the Netherlands.
    Email: a.morpurgo@tnw.tudelft.nl