期刊
JOURNAL OF APPLIED PHYSICS
卷 113, 期 21, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4808462
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资金
- state of Rhineland-Palatinate (MBWWK)
- state of Rhineland-Palatinate (MWKEL)
- European Regional Development Fund (ERDF)
A characterization of the magnetic properties of amorphous Co40Fe40B20 thin films, developed for low damping applications in magnon spintronics, using vector network analyzer ferromagnetic resonance (VNA-FMR) and the magneto-optical Kerr effect is presented. Our films show a very weak uniaxial anisotropy and a low Gilbert damping parameter (alpha = 0.0042). The saturation magnetization M-S extracted from the FMR measurements is 1250 kA/m. The frequency dependence of the first perpendicular standing spin waves mode on the applied magnetic field is used to determine the exchange constant A for this alloy resulting in a value of 1.5 x 10(-11) J/m. These values are discussed in comparison to literature values for different CoFeB compositions and other related alloys. (C) 2013 AIP Publishing LLC.
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