Fixing device and image formation apparatus

An image formation apparatus that includes a fixing device for causing a sheet, on which an unfixed image has been formed, to pass through a fixing nip, and thus thermally fixing the unfixed image onto the sheet, wherein

• the fixing device comprises:
• a belt that is heated by electromagnetic induction while being driven to rotate;
• a first roller positioned inside a closed rotation path of the belt;
• a second roller operable to form the fixing nip between an outer surface of the belt and the second roller, by pressing the first roller from outside the closed rotation path of the belt with the belt in between;
• an excitation coil positioned outside the closed rotation path of the belt;
• and
• a fixed plate that (i) is positioned inside the closed rotation path of the belt, substantially facing the excitation coil with the belt in between, (ii) comes into contact with an inner surface of the belt, and (iii) keeps the belt on the closed rotation path thereof,
• the belt includes, as a base member, a conductive heat generation layer that (i) generates heat due to an eddy current induced by magnetic flux generated by the excitation coil, and (ii) does not contain a magnetic shunt alloy, and
• the fixed plate has a layer structure including (i) a conductive layer and (ii) a magnetic shunt alloy layer that is closer to the belt than the conductive layer.