Regensburg 2013 – scientific programme

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MA: Fachverband Magnetismus

MA 50: Poster II

MA 50.68: Poster

Friday, March 15, 2013, 10:30–13:30, Poster D

FMR measurements: Thickness dependence of YIG film investigated by spin pumping — •René Röser¹, Andreas Kehlberger¹, Gerhard Jakob¹, Benjamin Jungfleisch², Burkard Hillebrands², Ulrike Ritzmann³, Denise Hinzke³, Dong Hun Kim⁴, Caroline Ross⁴, Ulrich Nowak³, and Mathias Kläui¹ — ¹Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany — ²Department of Physics, Institute of Technology Kaiserslautern, 67663 Kaiserslautern, Germany — ³Department of Physics, University of Konstanz, 78457 Konstanz, Germany — ⁴Department of Materials Science and Engineering, MIT, Cambridge, MA 02139, USA

The production method pulsed laser deposition (PLD) offers the opportunity to study high quality YIG (Y₃Fe₅O₁₂) films in the sub micrometer thickness regime (Yiyan Sun et al., Appl. Phys. Lett. 101, 152405 (2012)). Especially thin bilayer systems consisting of YIG coated with materials with high spin orbit coupling became focus of the general interest. These systems turned out to be an important mechanism for the generation of a spin current in nonmagnetic conductors by spin pumping (C.W. Sandweg et al., Phys. Rev. Lett. 106, 216601 (2011)). We present studies of a variety of YIG films produced by PLD. The films are characterized by the thickness, surface roughness and crystalline order. Furthermore the intrinsic magnetic properties are investigated by a SQUID and a Vector Network Analyzer-FMR setup. In order to determine the spin wave excitation spectrum in thin YIG films, which are coated with platinum, we compare films of thicknesses up to 300nm.