Magnetic recording medium having magnetic decoupling ability

A magnetic recording medium, comprising:

• a recording magnetic layer able to be recorded with magnetic information;
• a positioning magnetic layer used for positioning an optical head to a predetermined position relative to a magnetic head, the magnetic head applying a magnetic field to the recording magnetic layer and said optical head emitting a laser beam to the recording magnetic layer when positioning the optical head to the predetermined position and when recording the magnetic information in the recording magnetic layer;
• and
• a third magnetic layer between the recording magnetic layer and the positioning magnetic layer, a coercivity Hc3 of the third magnetic layer substantially disappearing when the optical head emits the laser beam to the recording magnetic layer to position the optical head to the predetermined position or to record the magnetic information in the recording magnetic layer.