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Authors: Weber, Ramon
Han, Dong-Soo
Boventer, Isabella
Jaiswal, Samridh
Lebrun, Romain
Jakob, Gerhard
Kläui, Mathias
Title: Gilbert damping of CoFe-alloys
Online publication date: 25-Oct-2019
Language: english
Abstract: We report structural, magnetic and dynamic properties of polycrystalline coxfe1-x-alloy films on sapphire, silicon, and mgo substrates across the full composition range, by using a vector network analyser ferromagnetic resonance measurement technique (vna-fmr), superconducting quantum interference device magnetometry (squid) and x-ray diffraction (xrd). in the approximate vicinity of 28% co, we observe a minimum of the damping parameter, associated with a reduction in the density of states to a minimum value at the fermi energy level. for films on all substrates, we find magnetic damping of the order of 4-5 . 10(-3), showing that the substrate does not play a major role. using a post-annealing process, we report a decrease of the magnetic damping down to 3-4 . 10(-3). we find that the saturation magnetization depends approximately reciprocally on the damping parameter with varying alloy composition.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
URN: urn:nbn:de:hebis:77-publ-593706
Version: Accepted version
Publication type: Zeitschriftenaufsatz
License: In Copyright
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Journal: Journal of physics : D, Applied physics
Pages or article number: Art. 325001
Publisher: IOP Publ.
Publisher place: Bristol
Issue date: 2019
ISSN: 0022-3727
Publisher URL:
Publisher DOI: 10.1088/1361-6463/ab2096
Appears in collections:JGU-Publikationen

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