Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 17: Micro- and Nanostructured Magnetic Materials
MA 17.1: Vortrag
Dienstag, 18. März 2025, 14:00–14:15, H18
Thin films of a dinuclear Fe2+ complex on HOPG: Spin-crossover studies using X-ray absorption spectroscopy — •Marcel Walter1, Sebastien Elie Hadjadj1, Clara Trommer2, Jorge Torres1, Jendrik Gördes1, David Swerev1, Christian Lotze1, Chen Luo3, Florin Radu3, Felix Tuczek2, Sangeeta Thakur1, and Wolfgang Kuch1 — 1Institut für Experimentalphysik, Freie Universität Berlin — 2Institut für Anorganische Chemie, Christian-Albrechts Universität zu Kiel — 3Helmholtz Zentrum Berlin for Materialien und Energie
The spin-crossover (SCO) properties of the dinuclear complex [ { Fe (H2 B(pz)2 )2 }2 µ − (ac (bipy)2) ] deposited as (sub)-monolayer and thin film by an ultra-high-vacuum liquid-jet deposition technique on highly oriented pyrolytic graphite (HOPG) were studied by X-ray absorption spectroscopy. A comparison of the SCO properties of thin films and a dropcast sample indicates that the spin-switching capability of the thin films is lower due to substrate*molecule interactions. The similar switching properties of the dropcast sample as of a bulk powder sample confirm that the SCO properties are not affected by the presence of solvent necessary for deposition. The soft-X-ray-induced excited spin-state trapping (SOXIESST) effect is pronounced in all samples, although the light-induced high-spin (HS) fractions of the dropcast and the thin-film samples on HOPG are higher as compared to the HS fraction attained by SOXIESST, which confirms the sensitivity of the complex to light.
Keywords: Dinuclear SCO; Pulsed layer injection; XAS; LIESST; SOXIESST