Control of magnetism atom by atom

Atom-by-atom engineering and magnetometry of tailored nanomagnets.
Alexander Ako Khajetoorians, JensWiebe, Bruno Chilian, Samir Lounis, Stefan Blügel and RolandWiesendanger
Nature Physics AOL (2012)

Antiferromagnetic chains of even and odd numbers of Fe atoms. Top panels: magnetization states from pair-KKR Ising model (left, partly degenerate) and magnetic images (right) of chains of antiferromagnetically coupled Fe atoms on Cu(111) with a lengths of three (a) to seven (e) atom