Spin wave localization in one-dimensional magnonic microcavity comprising yttrium iron garnet.

We demonstrate the localization of magnetostatic surface waves, i.e., spin waves, in a onedimensional magnonic microcavity substantialized with periodical conductivity modulation. The narrow localized state is observed inside band gaps and is responsible for a sharp transmission peak. The experimental results strongly agree with the theoretical prediction made with the shape magnetic anisotropy of the propagating medium composed of yttrium iron garnet taken into account. [ABSTRACT FROM AUTHOR]