Search
Home > Issues > SearchOptimization of Ferromagnetic Resonance Spectra Measuring Procedure for Accurate Gilbert Damping Parameter in Magnetic Thin Films Using a Vector Network Analyzer
Journal of Magnetics, Volume 16, Number 3, 30 Sep 2011, Pages 206-210
D.-H. Kim (Department of Physics, Inha University), H.-H. Kim (Department of Physics, Inha University), Chun-Yeol You * 
(Department of Physics, Inha University), Hyungsuk Kim * (Department of Electrical Engineering, Kwangwoon University)
(Department of Physics, Inha University), Hyungsuk Kim * (Department of Electrical Engineering, Kwangwoon University)
Abstract
We optimize a vector network analyzer ferromagnetic resonance (VNA-FMR) measurement system to study
spin dynamics and Gilbert damping parameters of thin ferromagnetic films. In order to obtain accurate damping
parameters, careful determination of the susceptibility line-width is required. The measured S-parameters
are converted into the corresponding susceptibility through a calibration processes. From the line-width measurements, we can successfully extract the saturation magnetizations and Gilbert damping parameters of 5-, 8-, and 10-nm thick Ni81Fe19 (Py) films.
spin dynamics and Gilbert damping parameters of thin ferromagnetic films. In order to obtain accurate damping
parameters, careful determination of the susceptibility line-width is required. The measured S-parameters
are converted into the corresponding susceptibility through a calibration processes. From the line-width measurements, we can successfully extract the saturation magnetizations and Gilbert damping parameters of 5-, 8-, and 10-nm thick Ni81Fe19 (Py) films.
Keywords: Gilbert damping parameter; vector network analyzer; Kittel’s equation; susceptibility
DOI: http://dx.doi.org/10.4283/JMAG.2011.16.3.206
Full Text : PDF
