Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 11: INNOMAG e.V. Dissertationspreis und Diplom-/Masterpreis 2017 — Vorträge der Nominierten

MA 11.1: Vortrag

Montag, 20. März 2017, 15:00–15:20, HSZ 101

Ab initio investigation of hybrid molecular-metallic interfaces as a tool to design surface magnetic properties for molecular spintronics — •Rico Friedrich — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

Organic-ferromagnetic interfaces form a crucial part of molecular spintronic devices [1]. Most previous studies however mainly focused onto the magnetic properties of the molecular part of the investigated structure. Here a complementary approach in which molecular adsorption is used to selectively design surface magnetic properties is outlined.

Organic molecules containing different elements can be used to selectively tune surface magnetic exchange interactions and hence to achieve a chemical functionalization of magnetic hysteresis curves [2]. Moreover, the molecular induced skyhook effect associated with the adsorption of finite-size molecular systems gives rise to a magnetic decoupling of the first and second surface layers [3]. 2D materials however enhance the in-plane but do not change the magnetic inter-layer coupling [4].

Building upon these findings, a complex molecule can be used to induce magnetic subunits within a single molecule-surface hybrid system offering a prospect towards intramolecular spin logic. Finally, generalizing the previous concepts, it is shown that the spin texture of a surface Rashba system can be selectively controlled by molecular adsorption.

[1] K. V. Raman et al. Nature 493, 509 (2013); [2] R. Friedrich et al. PRB 91, 115432 (2015); [3] R. Friedrich et al. PRB 92, 195407 (2015); [4] R. Friedrich et al. PRB 93, 220406(R) (2016).