公开(公告)号：US20190259416A1

公开(公告)日：2019-08-22

申请号：US16397332

申请日：2019-04-29

Applicant: FUJIFILM Corporation

Inventor： Shinji KAWAKAMI ,  Sadamu KUSE ,  Kenji TANAKA ,  Shinji TSUJIMOTO

IPC: G11B5/714 ,  G11B5/70 ,  G11B5/706

Abstract: The magnetic recording medium includes a non-magnetic substrate, a non-magnetic layer, and a magnetic layer, wherein the magnetic layer contains a hexagonal strontium ferrite magnetic powder, Mr and t satisfy 0.0020 μT·m≤Mr·t≤0.0150 μT·m, where Mr is the residual magnetic flux density of the magnetic layer, and t is the average thickness of the magnetic layer, L1 satisfies 2 nm≤L1≤6 nm, where L1 is the average thickness of a first mixed layer that is formed on the surface of the magnetic layer opposite to the non-magnetic layer, L2 satisfies 0.1≤L2/t≤0.45, where L2 is the average thickness of a second mixed layer that is formed on the surface of the magnetic layer facing the non-magnetic layer.