Magnetic recording medium having a dimensional variation
摘要
說明書
[Advantageous Effect]
For the magnetic recording medium 130 according to the third embodiment, as in the first embodiment, the width of the magnetic recording medium 10 can be kept constant or substantially constant by adjusting the tension in the longitudinal direction of the magnetic recording medium 10.
The magnetic recording medium 130 according to the third embodiment includes the seed layer 131 and the first base layer 132A between the substrate 111 and the second base layer 132B. The seed layer 131 contains Cr, Ni, and Fe, has a face-centered cubic lattice structure, and the (111) plane of the face-centered cubic structure is preferentially oriented to be parallel to the surface of the substrate 111. The first base layer 132A contains Co and O, and has a column structure in which the ratio of the average atomic concentration of O to the average atomic concentration of Co is 1 or more, and the average particle size is 3 nm or more and 13 nm or less. Thus, the recording layer 115 which has a favorable crystal orientation and a high coercivity can be achieved by reducing the thickness of the second base layer 132B, and using Ru which is an expensive material as little as possible.
