Spin Wave Resonance Frequency in the Bilayer Ferromagnetic Film
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The dependence of spin wave resonance (SWR) frequency on the surface anisotropy, the interlayer and interfacial coupling, the ferromagnetic layer thickness and the external magnetic field in the bilayer ferromagnetic film have been investigated by using the linear spin wave approximation and Green’s function technique. We find that the SWR frequency of the ferromagnetic bilayer films are shifted to higher values corresponding to those of above factors, respectively. The mode of the energetically highest can be controlled by the interfacial coupling, the thickness and the symmetry of the film. The SWR frequency of mode number m = 1 is almost flat except for applied magnetic field. Analytical details and the validity of the method are shown and discussed.
KeywordsSpin wave resonance Surface anisotropy Interlayer and interfacial coupling
The work was supported by the National Natural Science Foundation of China under Grant No. 11072104, and by the Science and Technology Research Projects in Colleges and Universities of Inner Mongolia of China under Grant Nos. NJZY16014 and NJZY13072, and by the Nature Science Foundation of Inner Mongolia of China under Grant No. 2012MS110.
- 29.Kaplan, B., Kapian, R.: J. Supercond. Nov. Magn. 29, 124953 (2016)Google Scholar