Abstract
The exchange interactions mediated by polarized itinerant carriers in diluted magnetic semiconductor (DMS) junction was studied. The induced moment possesses an spiral motion, accompanied by angular oscillations, in contrast to the ordinary Ruderman-Kittel-Kasuya-Yosida oscillations. The DMS was modeled by the Hamiltonian, containing the kinetic energy of the itinerant carriers and the exchange interaction between itinerant carriers. It was observed that the spiral motion remains robust in the entire regime below the Curie temperature, while the angular oscillations get enhanced as the polarization becomes small.