Aug 28 – 31, 2018
EPFL
Europe/Zurich timezone

【802】 Chemically selective reorganization of molecular Bi-layers films driven by molecule-substrate interactions

Aug 29, 2018, 2:00 PM
15m
CE 1 (EPFL)

CE 1

EPFL

Talk Magnetism and Spintronics at the Nanoscale Magnetism and Spintronics at the Nanoscale

Speaker

Mr Mehdi Heydari (Nanolab @ Dept. Physics, University of Basel, Switzerland)

Description

Reliable organic spintronic devices depend on spin-injecting interfaces with precisely architectured multilayers to avoid premature failure e.g. due to current filaments building up at defects. Using X-ray Magnetic Circular Dichroism (XMCD) we present unambiguous evidence that in the sequential fabrication of organic bilayer interfaces by physical vapor deposition (sublimation), molecules re-organize perpendicular to the interface plane. On the basis of systematic experiments we analyse the mechanisms in this unexpected behaviour. Our results provide an analogon to the earlier established case of atomic inter-layer mixing of interfaces built with delta-doped layers in semiconductor devices as well as layered oxide films.

Primary authors

Jan Nowakowski (Photon Science Department, PSI, Switzerland) Dr Milos Baljozovic (Photon Science Department, PSI, Switzerland) Mr Mehdi Heydari (Nanolab @ Dept. Physics, University of Basel, Switzerland) Jan Girovsky (Photon Science Department, PSI, Switzerland) Christian Waeckerlin (Photon Science Department, PSI, Switzerland) Aneliia Waeckerlin (Nanolab @ Dept. Physics, University of Basel, Switzerland) Thomas Nijs (Nanolab @ Dept. Physics, University of Basel, Switzerland) Fatemeh Mousavi (Nanolab @ Dept. Physics, University of Basel, Switzerland) Olha Popova (Nanolab @ Dept. Physics, University of Basel, Switzerland) Mina Moradi (Department of Chemistry and Bioanalytics, FHNW, Muttenz, Switzerland) Armin Kleibert (Photon Science Department, PSI, Switzerland) Nirmalya Ballav (Photon Science Department, PSI, Switzerland) Jan Dreiser (Photon Science Department, PSI, Switzerland) Thomas A. Jung (Photon Science Department, PSI, Switzerland)

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