Berlin 2015 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 69: GHz Dielectrics - Materials for mobile communication I (DF with HL/MM)
HL 69.3: Vortrag
Donnerstag, 19. März 2015, 10:20–10:40, EB 407
Enhanced magnetooptic Kerr effect and magnetic properties of Ce:YIG thin films — •Andreas Kehlberger1, Kornel Richter1, Gerhard Jakob1, Mehmet C. Onbasli2, Gerald F. Dionne2, Dong Hun Kim2, Taichi Goto2, Gerhard Götz3, Günter Reiss3, Timo Kuschel3, Caroline A. Ross2, and Mathias Kläui1 — 1Universität Mainz, Mainz, Germany — 2Massachusetts Institute of Technology, Cambridge, USA — 3CSMD, Physics Department, Bielefeld University, Germany
Yttrium iron garnet (YIG) is a ferrimagnetic and electrically insulating garnet oxide that has low intrinsic magnetic damping. These properties make YIG a functional layer for spin-wave generation and filtering for telecommunication devices operating at microwave bands. The substitution of Y by Ce allows for an enhancement of the magnetooptic properties and to further influence the magnetic material properties. Our work presents an extensive study of high quality epitaxial Ce:YIG thin films and reveals that not only the magnetooptic properties but also the magnetic anisotropy can be tailored by the Ce substitution. For the first time we show that beside the Faraday rotation also the magnetooptic Kerr effect is enhanced compared to pure YIG, making a broader range of wavelength, including the fibreoptics band, accessible. We present growth methods for polycrystalline Ce:YIG films, which allow the development of integrated on-ship devices.[1,2] Our results show the suitability of Ce:YIG thin film for future magnetooptic and spintronic applications. [1] Lei Bi et al., Nature Photon. 5, 758-762 (2011) [2] Taichi Goto et al., J. Appl. Phys. 113, 17A939 (2013)