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Magnetic Hardening Induced by Nonmagnetic Organic Molecules

Martin Callsen, Vasile Caciuc, Nikolai Kiselev, Nicolae Atodiresei, and Stefan Blügel
Phys. Rev. Lett. 111, 106805 – Published 4 September 2013
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Abstract

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.

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  • Received 30 April 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.106805

© 2013 American Physical Society

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Molecules for Spin Devices

Published 4 September 2013

Researchers propose a new type of spintronics device, based on an organic molecule bound to a surface, which could act as a spin filter or a magnetic memory element.

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Authors & Affiliations

Martin Callsen, Vasile Caciuc, Nikolai Kiselev, Nicolae Atodiresei*, and Stefan Blügel

  • Peter Grünberg Institut (PGI-1) and Institute of Advanced Simulation (IAS-1), Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

  • *n.atodiresei@fz-juelich.de

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Issue

Vol. 111, Iss. 10 — 6 September 2013

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