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Extremely High Frequency
In an epitaxial FeCo/MgAl2O4 system, there exist strong perpendicular anisotropy fields due to the presence of large triclinic strain near the interface, and self‐biased ferromagnetic resonance well into the EHF bands are observed. Strain relaxation with thickness leads to another lower ferromagnetic resonance frequency around 8 GHz from the upper portion of the film with...
Theoretically, tetragonal lattice distortion of FeCo epitaxial films can result in a very large in‐plane magnetic anisotropy field, leading to an extremely high ferromagnetic resonance (FMR) frequency. Herein, thin films are epitaxially grown on (001) MgAl2O4 single‐crystal substrates. A triclinic lattice distortion...