Fixing apparatus and image forming apparatus

An image forming apparatus comprising:

• a toner image forming unit that forms a toner image;
• a transfer unit that transfers the toner image formed by the toner image forming unit onto a recording medium;
• and
• a fixing unit that fixes, onto the recording medium, the toner image transferred onto the recording medium,
• a fixing unit including:
• a fixing member that has a base layer and a conductive layer formed therein and fixes a toner onto a recording medium when the conductive layer is heated by electromagnetic induction;
• a magnetic field generating member that generates an alternating-current magnetic field crossing the conductive layer formed in the fixing member;
• and
• a magnetic field inducing member that is arranged so as to face the magnetic field generating member across the fixing member, and that induces the alternating-current magnetic field generated in the magnetic field generating member thereinto or allows the alternating-current magnetic field to go therethrough,
• the base layer of the fixing member and the magnetic field inducing member each containing a material having a magnetic permeability change onset temperature in a temperature range from not less than a heating preset temperature of the fixing member to not more than a heatproof temperature of the fixing member, and
• a thickness of the base layer being smaller than a skin depth of the base layer at the heating preset temperature of the fixing member.