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Dresden 2017 – scientific programme

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MA: Fachverband Magnetismus

MA 65: Poster 2

MA 65.4: Poster

Friday, March 24, 2017, 09:30–13:00, P2-OG1

The Emegence of Cooperativity in the Coverage-Dependent Temperature and Light-Induced Spin-State Switching of an Fe(II) Complex Adsorbed on a Graphite Surface — •Lalminthang Kipgen1, Holger Naggert2, Matthias Bernien1, Fabian Nickel1, Lucas M. Arruda1, Andrew J. Britton1, Sascha Ossinger2, Felix Tuczek2, and Wolfgang Kuch11Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Institut für Anorganische Chemie, Christian-Albrechts Universität zu Kiel, 24098 Kiel, Germany

The spin-state manipulation from high-spin state (HS, S=2) to low-spin state (LS, S=0) or vice versa of spin crossover molecules adsorbed on a surface has been of much interest due to its potential for applications in spintronic devices. We report on the complete spin-state switching from the sub-monolayer to multilayer coverage of an Fe(II) complex deposited on a highly oriented pyrolytic graphite surface with temperature and light. For a sub-monolayer coverage, the thermal spin transition is rather gradual between 300 K to 70 K and can be fitted well as a system of non-interacting molecules along the Vant Hoff's model. With the increased in coverage, the transition becomes more abrupt, which is attributed to increase cooperativity between the molecules.

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