Magnetischer Aufzeichnungsträger.

摘要

A magnetic recording medium having a magnetic thin film of a composition expressed as (Coa Ptb Mc Md) 100-x Ox (where a, b, c, d are atomic percent; and x is weight percent). In this composition, a + b + c + d = 100, 0 < a, 0 < b is at least one element selected from P, Si and Ge; and M is at least one element selected from B, Ga, Al, In, Sn and Sb. Such magnetic thin film is capable of retaining a large coercive force regardless of its thickness and can be formed without the necessity of raising the base temperature during deposition of a magnetic layer.