Magnetic recording medium and process for production thereof

A process for producing a magnetic recording medium, which comprises

• imparting a kinetic energy in a range of 100 eV to 10 KeV to an ionized cluster composed of ferromagnetic metal atoms in a high vacuum corresponding to a pressure of 8.times.10.sup.-4 to 1.times.10.sup.-10 torr and impinging the resulting ionized cluster beam against a flexible substrate of polymeric material to deposit a first magnetic layer of the ferromagnetic metal on said substrate, and then,
• imparting a kinetic energy in a range of 1 eV to 10 KeV to atom ions of a ferromagnetic metal by an ion plating method in a high vacuum corresponding to a pressure of 8.times.10.sup.-4 to 1.times.10.sup.-10 torr and impinging the resulting atom ion beam against said first magnetic layer to deposit a second magnetic layer of the ferromagnetic metal on said first magnetic layer, wherein in forming the above first magnetic layer, a plate-like accelerating electrode is disposed on the side of the flexible substrate opposite its surface facing the ionized cluster source to field-accelerate the ionized cluster, and, in forming the said second magnetic layer, a plate-like accelerating electrode is disposed on the side of the substrate opposite its surface facing the atom ion source to field-accelerate the atom ions.