Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 34: Surface and Interface Magnetism II (jointly with O)

MA 34.8: Vortrag

Donnerstag, 14. März 2013, 12:15–12:30, H33

Chemically programmable 2D electron spin arrays — Christian Wäckerlin¹, •Jan Nowakowski¹, Shi-Xia Liu², Michael Jaggi², Jan Girovsky¹, Dorota Siewert¹, Aneliia Shchyrba³, Tatjana Hählen¹, Armin Kleibert¹, Peter M. Oppeneer⁴, Frithjof Nolting¹, Silvio Decurtins², Thomas A. Jung¹, and Nirmalya Ballav⁵ — ¹Paul Scherrer Institute, Switzerland — ²University of Bern, Switzerland — ³University of Basel, Switzerland — ⁴Uppsala University, Sweden — ⁵Institute of Science Education and Research, Pune, India

Spin-bearing metal-organic complexes on ferromagnetic substrates are interesting model-systems which allow studying the magnetism of individual magnetic ions in the proximity of a ferromagnetic metal. In our most recent work we have employed synthetically directed self-assembly to fabricate a highly ordered, two-dimensional chessboard-like supramolecular structure of Fe and Mn building-blocks which is exchange-coupled to a suitable ferromagnetic substrate. On-surface coordination-chemistry is then used to selectively control the spin-states in the resultant Fe-Mn-Fe spin-array. We have combined Scanning Tunneling Microscopy (STM) and X-ray Magnetic Circular Dichroism (XMCD) experiments which provide local/spatially averaged and element-specific information, respectively. High resolution STM also yields direct visualization of the axial ligands at the phthalocyanine cores.