Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 43: Focus Session: Spin Phenomena in Chiral Molecular Systems II (joint session O/TT)
TT 43.6: Vortrag
Mittwoch, 20. März 2024, 12:15–12:30, MA 141
Study of magneto-optical properties of cobalt-layers by adsorption of α-helical polyalanine self-assembled monolayers — •Lokesh Rasabathina1, Apoorva Sharma1, Julia Krone1, Annika Morgenstern1, Thi Ngoc Ha Nguyen1, Markus Gößler2, Karin Leistner2, Christoph Tegenkamp1, Georgeta Salvan1, and Olav Hellwig1 — 1Institute of Physics, Chemnitz University of Technology, 09126 Chemnitz, Germany — 2Institute of Chemistry, Chemnitz University of Technology, Chemnitz, 09111, Germany
High spin polarization in helical polyalanine molecules enables selective electron transport with a defined spin direction, a phenomenon known as Chirality Induced Spin Selectivity (CISS). This discovery holds promising implications for organic spintronic devices. Furthermore, the adsorption of pure enantiomers of α-helical polyalanine on a gold-covered ferromagnetic thin film, termed Magnetism Induced by the Proximity of Adsorbed Chiral molecules (MIPAC), can influence the magnetization of the ferromagnetic thin film. In our ongoing research, we are delving into the magnetic properties of thin films and attempt to increase the size of atomically smooth terraces at the Au(111) surface. By varying parameters such as deposition pressure and annealing temperature, we aim to understand how alterations in the Au surface affect the arrangement of molecules and how the molecule adsorption at the Au surface depends on the magnetic properties and state of the underlying magnetic thin film.
Keywords: CISS; MIPAC; Magneto Optic Kerr Effect; Hysteresis; Magnetic thin films