The influence of magnetostatic coupling in a Ni81 Fe19 Cu Ni81 Fe19 elliptical element on the ferromagnetic resonance (FMR) properties was experimentally and numerically investigated. Discontinuous variations in the FMR frequencies were observed when the relative orientation of magnetization was switched between parallel and antiparallel. Furthermore, the trilayer element exhibits field-insensitive FMR properties for magnetization of antiparallel orientation. This is attributable to the conflicted magnetic field dependence of the FMR frequency in the top and bottom Ni81 Fe19 layers with antiparallel magnetization.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)