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Cao, Y. (author), Yan, P. (author), Huebl, H. (author), Goennenwein, S.T.B. (author), Bauer, G.E.W. (author)
We formulate a scattering theory to study magnetic films in microwave cavities beyond the independent-spin and rotating-wave approximations of the Tavis-Cummings model. We demonstrate that strong coupling can be realized not only for the ferromagnetic resonance mode, but also for spin-wave resonances; the coupling strengths are mode dependent...
journal article 2015
Yan, P. (author), Kamra, A. (author), Cao, Y. (author), Bauer, G.E.W. (author)
The angular momentum vector of a Heisenberg ferromagnet with isotropic exchange interaction is conserved, while under uniaxial crystalline anisotropy the projection of the total spin along the easy axis is a constant of motion. Using Noether's theorem, we prove that these conservation laws persist in the presence of dipole-dipole interactions....
journal article 2013