Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 28: Surface Magnetism I (jointly with O)

MA 28.3: Vortrag

Mittwoch, 9. März 2016, 10:00–10:15, H31

Magnetic interlayer softening induced by molecular skyhook effect — •Rico Friedrich, Vasile Caciuc, Nicolae Atodiresei, and Stefan Blügel — Peter Grünberg Institut (PGI-1) and Institute for Advanced Simulation (IAS-1), Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany

The ability to tune surface magnetic exchange interactions by the adsorption of nonmagnetic organic molecules has opened a new direction of molecular spintronics research in which the magnetic properties of a substrate can be patterned down to the molecular scale [1,2,3]. Phenalenyl-based molecules deposited on a Co(111) substrate can magnetically decouple the Co atoms below the molecule from the bulk Co substrate leading to an experimentally measured interface magnetoresistance [2]. By systematically investigating weakly and strongly chemisorbed molecules as dioxan and dioxin on the prototypical ferromagnetic substrate of 2 monolayers Fe on W(110) we show that the inter-layer magnetic softening is the consequence of an increased distance between the first layer magnetic atoms directly binding the molecule and the second layer [4]. This molecular induced skyhook effect is present for both weakly and strongly chemisorbed molecules. Moreover, by increasing the molecule-surface hybridization the inter-layer magnetic softening is enhanced due to a chemical contribution.
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