If you are just trying to get the rotor off, you can try using some PB Blaster or WD40 on the mating surfaces to try to get it to loosen up. Then hit the rotor in between the studs [in the middle, not where it touches the brake pads] to try to shock it loose. If that doesn't work, a last resort is to use a breaker bar and socket to remove the hub nut. When I changed my front wheel bearing, I couldn't get the rotor to come loose so I removed the nut and hub and dropped the rotor and hub from about 6" in the air onto the studs to get the rotor to come loose. That worked fine. If you do it this way remember that you will need a new hub nut [one time use] and the front hub nut torque specs are 258 foot/lbs.
Edit-I put antisieze on the mating surfaces of the rotor when I reinstalled it so I don't have a problem next time.