Dresden 2009 – scientific programme
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MA: Fachverband Magnetismus
MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)
MA 40.65: Poster
Friday, March 27, 2009, 11:00–14:00, P1A
Cobalt-InAs-hybrid-structures operated at ferromagnetic resonance — •Philippe Klemm1, Sebastian Neusser1, Bernhard Botters1, Andreas Wittmann1, Christian Heyn2, and Dirk Grundler1 — 1Lehrstuhl für Physik funktionaler Schichtsysteme, — 2Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Jungiusstraße 11, Hamburg D-20355, Germany
It has been predicted that a ferromagnet operated in ferromagnetic resonance emits a spin current into adjacent nonmagnetic contacts, i.e. spin battery effect [1]. Recent experiments on multilayers of magnetic and non-magnetic metals have shown a corresponding spin precession effect, the so called spin pumping [2]. We present our approach on measuring a spin-precession induced voltage using a hybrid system of Al-Co-InAs (high mobility two-dimensional electron gas [3]). Samples are prepared using optical lithography and cleaved edge overgrowth. We discuss characterization measurements on the Co and InAs heterostructure. Furthermore, we present our broadband probe station setup used for GHz measurements. We acknowledge financial support through the German Excellence Cluster "Nanosystems Initiative Munich".
[1] A. Brataas et. al., Phys. Rev. B 66, 060404 (2002)
[2] B. Heinrich et al., Phys. Rev. Lett. 90, 187601 (2003)
[3]C. H. Möller et al., Appl. Phys. Lett. 80, 3988 (2002)