Spin Waves in Antidot Lattices [Elektronische Ressource] : From Quantization to Magnonic Crystals / Sebastian Neusser. Gutachter: Dirk Grundler ; Rudolf Gross. Betreuer: Dirk Grundler

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¨ ¨TECHNISCHE UNIVERSITAT MUNCHENLehrstuhl fu¨r Physik funktionaler Schichtsysteme, E10Spin Waves in Antidot Lattices:From Quantization to Magnonic CrystalsSebastian NeusserVollsta¨ndiger Abdruck der von der Fakulta¨t fu¨r Physik der TechnischenUniversita¨t Mu¨nchen zur Erlangung des akademischen Grades einesDoktors der Naturwissenschaftengenehmigten Dissertation.Vorsitzender: Univ.-Prof. Dr. H. FriedrichPru¨fer der Dissertation:1. Univ.-Prof. Dr. D. Grundler2. Univ.-Prof. Dr. R. GrossDie Dissertation wurde am 24.02.2011 bei der Technischen Universita¨tMu¨nchen eingereicht und durch die Fakulta¨t fu¨r Physik am 18.04.2011angenommen.Short AbstractSpin-wave (SW) propagation was studied in periodic arrays of 120 nmlarge holes, so called antidot lattices (ADLs). They were created by fo-cused ion beam lithography into 25 nm thin permalloy Ni Fe films.80 20GHz SW spectroscopy was performed all electrically by micro- andnanoscale coplanar waveguides. The ADL periodicity ranged from 300to 4000 nm. For 300 nm periodicity, coherent backscattering was found tocause magnonic miniband formation in the SW dispersion and large groupvelocities of 6 km/s. For 800 nm periodicity and long SW wave lengths,the ADL showed signatures of an unstructured plain film with effectiveproperties, i.e. metamaterial behavior. These effectively continuous prop-erties were also found to describe well SW transmission into the ADL.

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• Physik

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• Publié par: technische_universitat_munchen
• Publié le: 01 janvier 2011
• Nombre de lectures: 40
• Langue: Deutsch
• Poids de l'ouvrage: 7 Mo

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