Two-dimensional domain-wall magnon waves in superconducting ferromagnets
N. A. Logoboy, E. B. Sonin
DOI 10.1103/PhysRevB.75.153206 · Physical Review B
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Abstract
Propagation of magnetization waves along domain walls (DWs) in a superconducting ferromagnet (SCFM) leads to electromagnetic (EM) absorption which provides a direct evidence of magnetic order coexisting with superconductivity. The influence of long-range dipole-dipole interaction on the spectrum of two-dimensional magnons is essentially affected by the superconducting Meissner currents, which screen the magnetostatic fields and modify the long-wavelength spectrum from square root to linear. The excitation of the DW waves by an EM wave incident on a SCFM sample has been considered. This suggests using measurements of the surface impedance for the study of the DW waves and, eventually, for an effective probing of superconductivity-ferromagnetism coexistence.
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