发明名称 |
Magnetic flux barrier |
摘要 |
Data storage systems having barriers that may reduce erasure flux and increase write-ability are provided. Data storage systems include a writing element. The writing element has a write pole with a flare region. A magnetic flux barrier is located along the write pole flare region. The magnetic flux barrier is illustratively made from an in-plane magnetically anisotropic material that has an easy plane of magnetization. In another embodiment, a data storage system includes a writing element having an air bearing surface and a shield at the air bearing surface. The shield has a magnetic permeability of approximately zero. The shield illustratively includes alternating layers of positive and negative permeabilities. The shield optionally includes a plurality of shields that may include top, bottom, and side shields. |
申请公布号 |
US9171555(B2) |
申请公布日期 |
2015.10.27 |
申请号 |
US201514615940 |
申请日期 |
2015.02.06 |
申请人 |
Seagate Technology LLC |
发明人 |
Meloche Eric;Lu Bin;Jia Lixin;Xue Jianhua;Westwood John David;Gubbins Mark Anthony;Cazacu Alexandru |
分类号 |
G11B5/33;G11B5/11;G11B5/127;G11B5/31 |
主分类号 |
G11B5/33 |
代理机构 |
Westerman, Champlin & Koehler, P.A. |
代理人 |
Westerman, Champlin & Koehler, P.A. |
主权项 |
1. A data storage system writing element comprising:
an air bearing surface; and a shield at the air bearing surface, the shield having multiple layers and a magnetic permeability of approximately zero, wherein the multiple layers include at least one layer having a positive magnetic permeability and at least one layer having a negative magnetic permeability. |
地址 |
Cupertino CA US |