The quantum spin and valley characteristics in normal silicene/ferromagnetic silicene/normal silicene
junction are investigated under the effects of both electric field and the exchange field of the ferromagnetic
silicene. The spin resolved conductance and valley resolved conductance are deduced by solving the
Dirac equation. Results show resonant oscillations of both spin and valley conductance. These oscillations
might be due to confined states of ferromagnetic silicene. The spin and valley polarizations are also computed.
Their trends of figures show that they might be tuned and modulated by the electric field and the
exchange field of the ferromagnetic silicene. The present investigated silicene nanodevice might be good
for spin-valleytronics applications which are needed for quantum information processing and quantum
logic circuits.