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A non-standing character of directly imaged spin-waves in confinedmicron-sized ultrathin permalloy (Ni\textsubscript{80}Fe\textsubscript{20})structures is reported along with evidence of the possibility to alter theobserved state by modifications to the sample geometry. Using micromagneticsimulations the presence of the spin-wave modes excited in the permalloystripes along with the quasi-uniform modes were calculated. The predictedspin-waves were imaged in direct space using time resolved scanningtransmission X-ray microscopy, combined with a ferromagnetic resonanceexcitation scheme (STXM-FMR). STXM-FMR measurements revealed a non-standingcharacter of the spin-waves. Also it was shown by micromagnetic simulations andconfirmed with STXM-FMR results that the observed character of the spin-wavescan be influenced by the local magnetic fields in different sample geometries.

Imaging non-standing spin-waves in confined micron-sized ferromagnetic structures under uniform excitation