The motor should be between the drain of the FET and the supply, and there should be a reverse protection diode across it.
What do you imagine the Zener and Schottky diodes and Q1 do?
Have you tried driving it with a PWM pin ?
Thanks for everybody, I am sorry, the circuit is wrong, now change....
Have built that circuit yet ?
Correction:"Have you built that circuit yet ?"(I'm not going to tell him all he needs is themosfet and flyback diode.I'll let someone else do that...
Tried such a circuit
And that circuit looks correct, except that it will only function (reliably) with a minimum supply voltage of 15 V.If you want it to operate on less than that, you do need different components.