Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 65: Surface and Interface Magnetism II (jointly with MA)
O 65.8: 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.