Abstract
We have worked out the Ferromagnetic Resonance (FMR) mode characteristics of an interfacially coupled two-layer film system. The magnetocrystalline anisotropy was taken to be uniaxial. The coupling energy per unit area, E AB , was assumed to be of the form E AB = − KM A· M B with K isotropic. The analysis predicts the number, positions, intensities and linewid of the FMR peaks as a function of K. Detailed calculations are given for ferromagnetic coupling with the applied dc magnetic fields parallel to the film plane. The predictions are compared with our data on the NiFe/Ag/Ni and NiFe/SiO 2/Ni coupled systems. These analyses provide a basis for extension into more complicated situations: cubic magnetocrystalline anisotropy and angularly-dependent interfacial coupling, as examples. We have also worked out, for very strong coupling, the results for a dc field oriented arbitrarily with respect to the normal of the specimen. In all of the above cases the sum of the mode intensities was found to be invariant with K. Antiferromagnetic coupling is discussed briefly.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
