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

• DOI: 10.1063/1.4908301
• Publication Date: 2015-02-20T18:00:17Z
• Authors: Benjamin Buford; Pallavi Dhagat; Albrecht Jander
• Keywords: Laser linewidth

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 the measurement accuracy. We present method processing VNA-FMR measurements both value confidence interval these properties. The discussion presented FMR data obtained from stacks MgO/CoFeB/Ta/CoFeB/MgO with varying CoFeB thickness. Measured S-parameters de-embedded, drift corrected, fit Lorentzian curve, analyzed produce interval. A plotting fitting such that errors or can be visually shown.