Single shot acquisition of spatially resolved spin wave dispersion relations using X-ray microscopy.

ABSTRACT: For understanding magnonic materials the fundamental characterization of their frequency response is essential. However, determining full dispersion relations and real space wavelength measurements are challenging and time-consuming tasks. We present an approach for spin wave excitation by a modified Sinc pulse, which combines a cosine signal with a conventional Sinc function. The resulting adjustable frequency bands lead to a broadband spin wave excitation at uniform power levels. Subsequently, time resolved scanning transmission X-ray microscopy is used for direct imaging of all excited spin waves in real space. To demonstrate the capabilities of this approach, a modified Sinc excitation of an ultra-thin yttrium-iron-garnet film is shown that simultaneously reveals phase, amplitude, and

SUBMITTER: Trager N 

PROVIDER: S-EPMC7584636 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature