We present an all-optical time-resolved measurement of dipole-exchange spin wave spectra in a series of CoO capped Co(t)Pt(7Å) n-1 Co(t) multilayer systems, where the total Co moment (n × t) is constant. In general, the spectra consist of two intense peaks and additional lower intensity peaks. The observed spin wave modes are modeled by a discrete dipole approximation. The frequency of the spin wave bands depends significantly upon the magnetic anisotropy and the lattice spacing between planes. Both symmetric and anti-symmetric modes are observed from the calculation of the spin-wave profiles across the multilayer in the out-of-plane direction.
ASJC Scopus subject areas
- Physics and Astronomy(all)