| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high-density magnetic recording medium having high electromagnetic conversion characteristics and excellent travelling durability, especially excellent seek durability and temp. cycle durability, especially as a high-density magnetic disk having high track density and high line recording density. SOLUTION: This magnetic recording medium is produced by forming a base coating layer and a magnetic layer in this order on a nonmagnetic supporting body, and the magnetic layer is formed to <=0.20μm thickness. The magnetic powder in the magnetic layer consists of a ferromagnetic iron alloy powder containing Co. The component extracted from the magnetic layer and the base coating layer with n-hexane contains at least one kind of lubricant selected from fatty acids and fatty acid esters. The extracted amt. of the lubricant is >=30 mg/cm3. The wear volume of the magnetic layer by a ball abrasion test is 0.5×10-4 to 5.0×10-4 mm3.
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