公开(公告)号：US20230005503A1

公开(公告)日：2023-01-05

申请号：US17365863

申请日：2021-07-01

Applicant: Western Digital Technologies, Inc.

Inventor： Takashi Iwanami ,  Kouji Matsuda ,  Junguo Xu ,  Kenji Tasaka ,  Hoan Cong Ho ,  Tomoko Seki ,  Paul Christopher Dorsey ,  Masayoshi Shimokoshi

IPC: G11B5/73 ,  G11B5/66 ,  G11B5/65

Abstract: Various apparatuses, systems, methods, and media are disclosed to provide a heat-assisted magnetic recording (HAMR) medium that has a magnesium (Mg) trapping layer that is configured to mitigate Mg migration in the HAMR medium so as to prevent near field transducer (NFT) damage caused by dissociated Mg reacting with a compound used in the NFT. In one example, the HAMR medium can include a substrate, a seed layer on the substrate and including MgO, a magnetic recording layer on the seed layer, and a Mg trapping layer on the substrate and configured to mitigate Mg migration from the seed layer to a surface of the HAMR medium above the magnetic recording layer.