We report on room temperature ferromagnetic resonance (FMR) studies of [ t Co|2t Ni]  × N sputtered films, where 0.1 ≤ t ≤ 0.6 nm. Two series of films were investigated: films with the same number of Co|Ni bilayer repeats (N=12), and samples in which the overall magnetic layer thickness...

We have investigated electric field strengths in the Al<Subscript>x</Subscript>Ga<Subscript>1-x</Subscript>N layer, F<Subscript>AlGaN</Subscript>'s, of Al<Subscript>x</Subscript>Ga<Subscript>1-x</Subscript>N/GaN heterostructures with and without a GaN cap layer using photoreflectance (PR) spectroscopy. Franz-Keldysh oscillations (FKOs) from the Al<Subscript>x</Subscript>Ga<Subscript>1-x</Subscript>N layer are clearly observed in the PR spectra. It is...</subscript></subscript></subscript></subscript></subscript></subscript></subscript>