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:
Mar. 08, 2016
Filed:
Dec. 13, 2013
Hgst Netherlands B.v., Amsterdam, NL;
Olav Hellwig, San Jose, CA (US);
Oleksandr Mosendz, San Jose, CA (US);
Dieter K. Weller, San Jose, CA (US);
HGST Netherlands B.V., Amsterdam, NL;
Abstract
An 'all optical switching' (AOS) magnetic recording system, i.e., one that does not require a magnetic field to reverse the magnetization in the magnetic recording media, uses a FeMnPt L1alloy as the magnetic media. A FeMnPt alloy, with appropriate amounts of Mn, will have high magneto-crystalline anisotropy, but also ferrimagnetic spin alignment for triggering AOS. The combination of high magneto-crystalline anisotropy and ferrimagnetic spin configuration enables the FeMnPt media to function as magnetic media whose magnetization can be switched solely by polarized laser pulses. The FeMnPt media for may be a single layer with or without any segregants. Alternatively, the FeMnPt media may be a multilayered recording layer comprising alternating layers of FePt and MnPt L1ordered alloys. The segregant-free embodiments of the FeMnPt material may be patterned to form bit-patterned-media (BPM).