Affiliation
Institute of Semiconductors, Chinese Academy of Science
Title
Magnetic resonances in a strong magnetism modulated two-dimensional electron gas
Abstract
We conduct an experimental study of high-mobility two-dimensional electron gas (2DEG) in GaAs/AlGaAs quantum wells modulated by strong magnetism and microwave manipulation. The modulated magnetic fields are constructed via the stripe and gratings made of the rare earth elements on the sample surface. We observe that the complicated ferromagnetic resonances (FMRs) persist until above several tens Kelvins in both the stripe and grating samples, for the FM phase of the magnetic metal exists at above 100 K. The high-order (with an integer number j) FMR can also be observed in the stripe structure by means of the microwave photovoltaic effect. In addition, our analysis indicates that the magnetocrystalline induced magnetization anisotropy of rare earth elements cannot be overlooked in FMR experiments.