MAGNETIC RECORDING MEDIUM

摘要

A magnetic recording medium includes an anti-ferromagnetic layer 2 layered on at least one of the opposite major surfaces in a direction along the thickness of a ferromagnetic recording layer 3. It is possible for magnetization in the vicinity of a surface of an anti-ferromagnetic layer 2 facing a ferromagnetic recording layer 3 to be rotated simultaneously with rotation of magnetization of the ferromagnetic recording layer 3. It is also possible for the intensity of exchange coupling between the two layers to be larger than the total magnetic anisotropy of the anti-ferromagnetic layer 2. It is similarly possible for the intensity of the exchange coupling between the two layers to be smaller than the total magnetic anisotropy of the anti-ferromagnetic layer 2 and larger than the magnetic domain energy of the anti-ferromagnetic layer 2. By the above constitution, it is possible to realize a high energy of magnetic anisotropy of the particles of the magnetic material to raise the coercivity to cope with higher recording density expected in near future.