The static and dynamic magnetization properties for a NiFe/Pt/CoFeB tri-layered film have been investigated. We find that the two ferromagnetic layers separated by a Pt spacer are ferromagnetically coupled even at room temperature. Moreover, the damping constant for the NiFe layer is found to show the significant enhancement with non-linear power dependence. These unique magnetic features observed in the NiFe layer can be understood by the weak ferromagnetism induced in the Pt spacer between two ferromagnetic layers.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics