Magnetic hardening induced by nonmagnetic organic molecules

We reveal for the first time through a theoretical first-principles study that the adsorption of a nonmagnetic π-conjugated organic molecule on a ferromagnetic surface locally increases the strength of the magnetic exchange interaction between the magnetic atoms binding directly to the molecule. Thi...

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Bibliographic Details
Published in:Physical review letters 2013-09, Vol.111 (10), p.106805-106805, Article 106805
Main Authors: Callsen, Martin, Caciuc, Vasile, Kiselev, Nikolai, Atodiresei, Nicolae, Blügel, Stefan
Format: Article
Language:English
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Summary:We reveal for the first time through a theoretical first-principles study that the adsorption of a nonmagnetic π-conjugated organic molecule on a ferromagnetic surface locally increases the strength of the magnetic exchange interaction between the magnetic atoms binding directly to the molecule. This magnetic hardening effect leads to the creation of a local molecular mediated magnetic unit with a stable magnetization direction and an enhanced barrier for the magnetization switching as compared to the clean surface. Remarkably, such a hybrid organic-ferromagnetic system exhibits also a spin-filter functionality with sharp spin-split molecularlike electronic features at the molecular site.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.111.106805