Magnetic recording medium and method of producing the same

A magnetic recording medium comprising:

• a glass substrate which has a principal surface and which includes a compressive stress layer as a surface layer having said principal surface;
• and a magnetic layer formed on the principal surface of said the glass substrate;
• wherein:
• said glass substrate has the principal surface provided with a texture for inducing magnetic anisotropy in said magnetic layer;
• an oriented ratio of magnetic anisotropy in terms of a product of residual magnetization and film thickness being equal to 1.2 or more in said magnetic recording medium.

A method of producing a magnetic recording medium having magnetic anisotropy, in which a nonmagnetic layer and a magnetic layer are formed on a principal surface of a glass substrate having a compressive stress layer as a surface layer and a texture formed on said principal surface of the glass substrate to induce magnetic anisotropy in said magnetic layer, said method comprising the steps of:

• preliminarily obtaining correlation between an oriented ratio of magnetic anisotropy and each of a compressive stress value on the principal surface of said glass substrate and a thickness of said nonmagnetic layer;
• selecting the compressive stress value and the thickness of said nonmagnetic layer as selected conditions with reference to the correlation so as to obtain a predetermined oriented ratio;
• and
• forming the compressive stress layer of said glass substrate and said nonmagnetic layer in accordance with the selected conditions.