Parts | Days | Selection | Search | Updates | Downloads | Help
DS: Fachverband Dünne Schichten
DS 4: Magnetic / Organic Interfaces, Spins in Organics and Molecular Magnetism (jointly with MA)
DS 4.3: Talk
Monday, March 31, 2014, 15:45–16:00, CHE 91
Investigation of the magnetic exchange coupling between MnTPPCl molecules and a ferromagnetic cobalt substrate by X-ray photo-emission electron microscopy — •Jan Girovsky1, Michele Buzzi1, Christian Waeckerlin1, Dorota Siewert2, Jan Nowakowski1, Peter M. Oppeneer3, Frithjof Nolting1, Thomas A. Jung1, Nirmalya Ballav4, and Armin Kleibert1 — 1Paul Scherrer Institut, Switzerland — 2University of Basel, Switzerland — 3Uppsala University, Sweden — 4Indian Institute of Science Education and Research, Pune, India
Adsorption of spin bearing metallo-porphyrins and -phthalocyanines on ferromagnetic substrates leads to an exchange induced magnetic moment on the molecules [1]. The magnetic coupling across the magneto-organic interface can be further modified by the introduction of a non-magnetic spacer layer [2]. In this contribution we use X-ray photo-emission electron microscopy combined with X-ray magnetic circular dichroism to study the magnetic exchange coupling between Mn-porphyrin molecules and a ferromagnetic cobalt substrate through a Cr spacer layer with increasing thickness. Our spectro-microscopic correlation enables us not only to study the local magnetic coupling of the molecules, but also their chemical state and the spatial distribution of the respective elements on the sample [3].
[1] A. Scheybal et al., Chem. Phys. Lett. 411, 214 (2005).
[2] C. F. Hermanns et al., Adv. Mater. 25, 3473 (2013).
[3] J. Girovsky et al., Chem. Commun., accepted (2013).