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A technique for error estimation of linewidth and damping parameters extracted from ferromagnetic resonance measurements Public Deposited

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  • Ferromagnetic resonance (FMR) characterization, using a vector network analyzer (VNA), is widely used to determine anisotropy, g-factor, and Gilbert damping parameter of magnetic thin films, but results are typically reported without calculation of the measurement accuracy. We present a method of processing VNA-FMR measurements to determine both the value and confidence interval of these properties. The discussion is presented using FMR data obtained from stacks of MgO/CoFeB/Ta/CoFeB/MgO with varying CoFeB thickness. Measured S-parameters are de-embedded, drift corrected, fit to a Lorentzian curve, and analyzed to produce a confidence interval. A method of plotting the results of the Lorentzian fitting such that fitting errors or measurement drift can be visually analyzed is shown.
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  • Buford, B., Dhagat, P., & Jander, A. (2015). A technique for error estimation of linewidth and damping parameters extracted from ferromagnetic resonance measurements. Journal of Applied Physics, 117(17), 17E109. doi:10.1063/1.4908301
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  • 117
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  • 17
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  • This work was supported in part by a Grant from the Semiconductor Research Corporation.
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  • description.provenance : Submitted by Patricia Black (patricia.black@oregonstate.edu) on 2015-08-03T20:01:20Z No. of bitstreams: 1 BufordBenjaminEECSTechniqueErrorEstimation.pdf: 917034 bytes, checksum: bca601a06a4696b65c82b56ac67d135f (MD5)
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