Invention Grant
- Patent Title: Apparatus including a perpendicular magnetic recording layer having a convex magnetic anisotropy profile
- Patent Title (中): 包括具有凸磁各向异性轮廓的垂直磁记录层的装置
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Application No.: US12847745Application Date: 2010-07-30
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Publication No.: US09142240B2Publication Date: 2015-09-22
- Inventor: Thomas Patrick Nolan , Hans Jürgen Richter
- Applicant: Thomas Patrick Nolan , Hans Jürgen Richter
- Applicant Address: US CA Cupertino
- Assignee: SEAGATE TECHNOLOGY LLC
- Current Assignee: SEAGATE TECHNOLOGY LLC
- Current Assignee Address: US CA Cupertino
- Agency: Hollingsworth Davis, LLC
- Main IPC: G11B5/66
- IPC: G11B5/66 ; G11B5/82 ; G11B5/65

Abstract:
An apparatus may include a first magnetic layer, a first exchange break layer formed on the first magnetic layer, a second magnetic layer formed on the first exchange break layer, a second exchange break layer formed on the second magnetic layer, and a third magnetic layer formed on the second exchange break layer. The first magnetic layer has a first magnetic anisotropy energy, Hk1, the second magnetic layer has a second magnetic anisotropy energy, Hk2, and the third magnetic layer has a third magnetic anisotropy energy, Hk3. In some embodiments, Hk1−Hk2 is less than Hk2−Hk3. In some embodiments, the apparatus may be a perpendicular magnetic recording medium.
Public/Granted literature
- US20120026626A1 APPARATUS INCLUDING A PERPENDICULAR MAGNETIC RECORDING LAYER HAVING A CONVEX MAGNETIC ANISOTROPY PROFILE Public/Granted day:2012-02-02
Information query
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