Abstract
The spin-wave resonance (SWR) spectra have been observed in the (001) oriented La0.7Mn1.3O3−δ epitaxial films. The spectra consist of a series of well-resolved spin-wave modes clearly seen in the perpendicular external field configuration. It is shown that the spins are completely pinned on both sides of the film surface. Based on a study of the SWR spectra the value of the spin-wave exchange constant, D, is found to be 150 meV Å2. This value of D correlates well with this one determined for all known until now manganites.
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