Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8157836 | Journal of Magnetism and Magnetic Materials | 2013 | 4 Pages |
Abstract
We investigate the broadband ferromagnetic resonance dispersion relation of NiFe/IrMn multilayers using the vector network analyzer ferromagnetic resonance (VNA-FMR) method. Multilayered films with structure [NiFe(20 nm)/IrMn (tIrMn)/Ta(3 nm)]Ã10 (with tIrMn=4 and 15 nm) were produced onto Si(100) substrates using magnetron sputtering. The dispersion relations of the samples were extracted from the resonance spectra in the range of 0.1-7 GHz under magnetic fields of up to±300 Oe. Static magnetization curves were also obtained in the same field range. The experimental data were compared with numerical calculations performed using the granular exchange-bias model which takes into account both, the unidirectional and rotatable anisotropy present in the samples. A good agreement between numerical and experimental results was achieved without the need of any frequency or field-dependent parameter.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
R. Dutra, D.E. Gonzalez-Chavez, T.L. Marcondes, A.M.H. de Andrade, J. Geshev, R.L. Sommer,