The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2012
Filed:
Dec. 09, 2009
Qunwen Leng, Palo Alto, CA (US);
Jian X. Shen, Pleasanton, CA (US);
Feng Liu, San Ramon, CA (US);
Geoffrey W. Anderson, Dublin, CA (US);
Qunwen Leng, Palo Alto, CA (US);
Jian X. Shen, Pleasanton, CA (US);
Feng Liu, San Ramon, CA (US);
Geoffrey W. Anderson, Dublin, CA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
A method and system for providing a magnetic structure in magnetic transducer is described. The method and system include providing a pinning layer, a synthetic antiferromagnetic (SAF) adjacent to the pinning layer, a nonmagnetic layer, and a sensor layer. The SAF resides between the nonmagnetic and pinning layers. The nonmagnetic layer is between the SAF and the sensor layer. The SAF includes a pinned layer, a reference layer, and a nonmagnetic spacer layer between the pinned and reference layers. The pinned layer is magnetically coupled with the reference layer and includes sublayers. A first sublayer has a first blocking temperature distribution (T) and a first exchange energy. A second sublayer has a second Tand a second exchange energy. The first sublayer is between the pinning layer and second sublayer. The first Tis greater than the second T. The first exchange energy is less than the second exchange energy.