| Popis: |
Yttrium–iron–garnet (YIG) is an important component used in filters and other microwave devices. In this work we investigate the behavior of driven magnetostatic wave modes in rectangular YIG films subject to an in‐plane magnetic field. Patterned slotlines and coplanar waveguides are used to drive the film at separate spatial locations with microwave (2–4 GHz) excitations corresponding to the magnetostatic wave modes. For a single excitation with sufficient power above the Suhl instability, the transmitted power through the film displays periodic low‐frequency (10 kHz) auto‐oscillations. As the drive amplitude is increased, these oscillations may display period‐doubling, intermittency, and high‐dimensional behavior, including chaos. A second microwave drive applied to the sample excites additional spin‐wave modes that interact with those arising from the original excitation. These interactions result in additional low‐frequency components in the observed auto‐oscillations. |
