Clamping inductive kickback of PWM fans?

(can you elaborate on that since you have a scope ? What is your idea of "briefly" ?

No I can't at this time... I will when I get it back on the bench. It is a good question, and I figured someone was going to ask when I was typing the original question. Is it unrealistic to expect to clamp the spike totally or am I always going to have some?

Why do people think there is some necessity or advantage of using a Schottky diode for this purpose?

I usually use them for the low voltage drop, but in this case it was just what I had in the parts bin. That is one reason I am asking is it the correct type to be using? My understanding is a faster diode will perform better in this application?

The better spot for the diodes would be at the driver?