  One of the most intriguing properties of magnonic systems is their
reconfigurability, where an external magnetic field alters the static magnetic
configuration to influence magnetization dynamics. In this paper, we present an
alternative approach to tunable magnonic systems. We studied a magnonic crystal
induced within a uniform magnetic layer by a periodic magnetic field pattern
created by the array of superconducting strips. We showed that the spin-wave
spectrum can be tuned by the inhomogeneous stray field of the superconductor in
response to a small uniform external magnetic field. Additionally, we
demonstrated that modifying the width of superconducting strips and separation
between them leads to the changes in the internal field which are unprecedented
in conventional magnonic structures. The paper presents the results of
semi-analytical calculations for realistic structures, which are verified by
numerical calculations.
