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:
Aug. 29, 2006
Filed:
Dec. 16, 2003
GE Yi, Culmore, IE;
Robert W. Lamberton, Limavady, IE;
Susan Jane Tara Murdoch, Londonderry, IE;
Thomas K. Mclaughlin, Londonderry, IE;
William J. O'kane, Limavady, IE;
Ge Yi, Culmore, IE;
Robert W. Lamberton, Limavady, IE;
Susan Jane Tara Murdoch, Londonderry, IE;
Thomas K. McLaughlin, Londonderry, IE;
William J. O'Kane, Limavady, IE;
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A spin polarization enhancement artificial (SPEA) magnet comprises combinations of positive spin asymmetry interfaces and inverse spin asymmetry interfaces arranged antiferromagnetically such that current passed through the SPEA magnet has enhanced spin polarization. The SPEA magnet additionally may combine bulk material properties of electron scattering to either supplement or replace the interfacial spin differentiation. A basic functional unit of the SPEA magnet includes two ferromagnetic layers separated by two spacer layers. Each spacer forms an interface such that adjacent ferromagnetic layers produce different spin symmetry. Antiferromagnetic arrangement of adjacent ferromagnetic layers coordinates the different spin symmetries such that a single spin state is selected and also provides additional stabilization to the SPEA magnet.