dc.contributor.authorHe, Shikun
dc.contributor.authorPanagopoulos, Christos
dc.identifier.citationHe, S., & Panagopoulos, C. (2016). A broadband ferromagnetic resonance dipper probe for magnetic damping measurements from 4.2 K to 300 K. Review of Scientific Instruments, 87(4), 043110-.en_US
dc.description.abstractA dipper probe for broadband Ferromagnetic Resonance (FMR) operating from 4.2 K to room temperature is described. The apparatus is based on a 2-port transmitted microwave signal measurement with a grounded coplanar waveguide. The waveguide generates a microwave field and records the sample response. A 3-stage dipper design is adopted for fast and stable temperature control. The temperature variation due to FMR is in the milli-Kelvin range at liquid helium temperature. We also designed a novel FMR probe head with a spring-loaded sample holder. Improved signal-to-noise ratio and stability compared to a common FMR head are achieved. Using a superconducting vector magnet we demonstrate Gilbert damping measurements on two thin film samples using a vector network analyzer with frequency up to 26 GHz: (1) A Permalloy film of 5 nm thickness and (2) a CoFeB film of 1.5 nm thickness. Experiments were performed with the applied magnetic field parallel and perpendicular to the film plane.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent7 p.en_US
dc.relation.ispartofseriesReview of Scientific Instrumentsen_US
dc.rights© 2016 American Institute of Physics (AIP). This paper was published in Review of Scientific Instruments and is made available as an electronic reprint (preprint) with permission of AIP. The published version is available at: [http://dx.doi.org/10.1063/1.4946789]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.en_US
dc.subjectSample handlingen_US
dc.subjectMagnetic filmsen_US
dc.titleA broadband ferromagnetic resonance dipper probe for magnetic damping measurements from 4.2 K to 300 Ken_US
dc.typeJournal Article
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionPublished versionen_US

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