Fixing device, image forming apparatus using the fixing device, and fixing method

The present invention relates to a fixing device which is provided with a magnetic heating layer and can accurately control the temperature at the end part of the heating rotor in axial direction. A magnetic flux adjusting component 2b of a magnetic flux generating part 2 is configured at the external side of the fixing roller 3. Compared with magnetic flux adjusting component 2b configured at the inner side of the fixing roller 3, the accurate position control can be executed. As long as the magnetic flux adjusting component 2b substantially enters the space between the coil 2a and the arc-shaped core part 2d, the temperature ascending of two end parts of the fixing roller 3 in the direction of long edge can be controlled more effectively through the central clearance in the direction of long edge. If the magnetic flux adjusting component 2b totally departs from the space between the coil 2a and the arc-shaped core part 2b, the adjusting to the magnetic flux can not be executed. Between the two states, the e