Suppression of periodic spatial power transfer in a layered structure based on ferromagnetic films

• Published in: Journal of magnetism and magnetic materials Vol. 466; pp. 119 - 124
• Main Authors: Morozova, M.A., Romanenko, D.V., Matveev, O.V., Grishin, S.V., Sharaevskii, Yu.P., Nikitov, S.A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.11.2018; Elsevier BV
• Subjects: Coupled structure; Electricity distribution; Ferromagnetic film; Ferromagnetic films; Ferromagnetic materials; Heterostructures; Light scattering; Magnetic thin films; Magnetostatic wave; Mathematical models; Nonlinear equations; Nonlinear wave phenomena; Numerical analysis; Power transfer; Magnetostatic wave; Ferromagnetic film; Nonlinear wave phenomena; 78A30; Coupled structure; 78A40
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2018.06.077

•We observed the suppression of power transfer in layered ferromagnetic structure.•We developed the nonlinear theoretical model.•We determined the mechanism of this phenomenon. The features of wave processes in a heterostructure based on two ferromagnetic films separated by a layer of non-magnetic dielectric layer have been investigated at different levels of the input signal power. It has been experimentally demonstrated using Brillouin light scattering set-up that at low input power it is transferred from one film to another along the length of the structure, which is typical for any spatially distributed coupled systems. At a certain level of input power the inhibition of periodic power transfer from one film to another is observed, therefore, the coupling between the films disappears. In order to explain this effect, we have developed the theory based on the model of two nonlinear equations for the amplitudes enveloping the signals in each film. Numerical calculation results are in a good agreement with experimental data.