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O: Fachverband Oberflächenphysik
O 2: Organic Molecules on Inorganic Substrates I: Electronic, Optical and Other Properties I
O 2.7: Talk
Monday, March 27, 2023, 12:00–12:15, CHE 89
Substrate induced magnetic alignment and magnetization dynamics of dimetallofullerene single-molecule magnets — •Tobias Birk1, Fabian Paschke2, Vivien Enenkel1, Fupin Liu3, Jan Dreiser4, Vladyslav Romankov4, Stanislav M. Avdoshenko3, Alexey A. Popov3, and Mikhail Fonin1 — 1Department of physics, University of Konstanz, 78457 Konstanz, Germany — 2IBM Research Europe, 8803 Rüschlikon, Switzerland — 3IFW Dresden, 01069 Dresden, Germany — 4SLS, PSI, 5232 Villigen, Switzerland
Since several years, lanthanide based single-molecule magnets (SMMs) are in focus of a broad research community due to their record high blocking temperatures above 77 K [1]. However, surface supported SMMs lag behind in terms of blocking temperatures and relaxation times due to molecule-substrate interactions. Yet, for the surface-supported lanthanide dimetallofullerene SMMs blocking temperatures of up to 28 K and long relaxation times were reported [2]. Here, we study the effect of coupling to a metallic substrate on the electronic and magnetic properties of Dy2@C80CH2Ph and compare those to our results for the graphene substrate [3,4]. A combination of scanning tunneling microscopy, -spectroscopy and X-ray absorption spectroscopy provides a detailed insight into the local electronic properties as well as magnetization dynamics of the studied SMMs.
[1] F.S. Guo et al. Science 362, 6421. [2] F. Liu et al. Nat. Commun. 10, 571 (2019). [3] F. Paschke et al. Adv. Mater. 2102844 (2021). [4] F. Paschke et al. Small 2105667 (2022)