  We studied the exchange interactions mediated by polarized itinerant carriers
in diluted magnetic semiconductor (DMS) junction. In contrast to the ordinary
RKKY oscillations, the induced moment possesses an interesting spiral motion,
accompanied with angular oscillations. The spiral motion remains robust in the
entire $T<T_{c}$ regime while the oscillatory motion gets enhanced as $T \to
T_{c}$. To explore the novel phenomena, we propose a
ferromagnet/DMS/ferromagnet junction would bring out interesting spin-dependent
transport properties and possible applications in spintronics.
