Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/81652
Title: A broadband ferromagnetic resonance dipper probe for magnetic damping measurements from 4.2 K to 300 K
Authors: He, Shikun
Panagopoulos, Christos
Keywords: Sample handling
Magnetic films
Issue Date: 2016
Source: He, 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-.
Series/Report no.: Review of Scientific Instruments
Abstract: A 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.
URI: https://hdl.handle.net/10356/81652
http://hdl.handle.net/10220/40901
ISSN: 0034-6748
DOI: 10.1063/1.4946789
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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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