Media type: E-Article Title: Beyond the Heisenberg Model: Anisotropic Exchange Interaction between a Cu-Tetraazaporphyrin Monolayer andFe3O4(100) Contributor: Klanke, J.; Rentschler, E.; Medjanik, K.; Kutnyakhov, D.; Schönhense, G.; Krasnikov, S.; Shvets, I. V.; Schuppler, S.; Nagel, P.; Merz, M.; Elmers, H. J. Published: American Physical Society (APS), 2013 Published in: Physical Review Letters, 110 (2013) 13 Language: English DOI: 10.1103/physrevlett.110.137202 ISSN: 0031-9007; 1079-7114 Origination: Footnote: