Method and system for providing an improved sensor stack for a recording head

US8755152B1 · kind B1 · utility

Assignee

• WESTERN DIGITAL (FREMONT), LLC · US

Inventors

• Chando Park · San Diego, US
• Qunwen Leng · Palo Alto, US
• Min Zhou · Suzhou, CN
• Sangmun Oh · San Jose, US
• Mahendra Pakala · San Jose, US

Key dates

• Filing date: Sep 24, 2008
• Grant date: Jun 17, 2014
• Expiry date: Nov 12, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1193
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and system for providing a magnetic transducer is described. The method and system include providing a magnetic shield, an insertion layer on the magnetic shield, an antiferromagnetic (AFM) layer, a pinned layer magnetically coupled with the AFM layer, a nonmagnetic spacer layer, and a free layer. The magnetic shield has a texture and a grain size. The insertion layer has a thickness that is sufficiently large that the AFM layer is magnetically decoupled from the magnetic shield and sufficiently small that the AFM layer is structurally coupled with the magnetic shield. The pinned layer resides between the AFM layer and the nonmagnetic spacer layer. The nonmagnetic spacer layer resides between the free layer and the pinned layer.