Recording medium having magnetic layer of smaller thickness

A magnetic recording medium comprising:

• a first magnetic recording layer having a first value of saturation magnetic flux density and including magnetic crystal grains and non-magnetic atoms, said non-magnetic atoms diffusing along a boundary between adjacent ones of the magnetic crystal grains;
• and
• a second magnetic recording layer directly formed on the first magnetic recording layer, said second magnetic recording layer having a second value of saturation magnetic flux density larger than the first value, a thickness of the second magnetic recording layer being set in a range between 0.5 nm and 3.0 nm;
• and
• a carbon protection layer directly formed on the second magnetic recording layer.

A magnetic recording medium comprising:

• a magnetic substratum including magnetic crystal grains and non-magnetic atoms, said non-magnetic atoms diffusing along a boundary between adjacent ones of the magnetic crystal grains;
• a first magnetic recording layer directly formed on the magnetic substratum, said first magnetic recording layer having a first value of saturation magnetic flux density;
• and
• a second magnetic recording layer directly formed on the first magnetic recording layer, said second magnetic layer having a second value of saturation magnetic flux density larger than the first value.