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:
Oct. 23, 2012
Filed:
Feb. 06, 2009
Naoki Ohta, Tokyo, JP;
Hiroshi Yamazaki, Tokyo, JP;
Kosuke Tanaka, Tokyo, JP;
Takayasu Kanaya, Tokyo, JP;
Kei Hirata, Tokyo, JP;
Naoki Ohta, Tokyo, JP;
Hiroshi Yamazaki, Tokyo, JP;
Kosuke Tanaka, Tokyo, JP;
Takayasu Kanaya, Tokyo, JP;
Kei Hirata, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
The invention is devised to provide a magnetoresistive element that is hardly susceptible to harmful influence of unnecessary magnetic fields and noise of heat even when reduction in size is achieved to be adaptable to higher recording density, and therefore that is excellent in operational reliability. The magnetoresistive element includes a stacked structure including, in order: a magnetically pinned layer whose magnetization direction is fixed in a given direction; a non-magnetic layer; a magnetically free layer whose magnetization direction changes according to an external magnetic field; and an antiferromagnetic bias layer exchange-coupled with the magnetically free layer. The exchange-coupling magnetic field between the magnetically free layer and the antiferromagnetic bias layer is smaller than a saturation magnetic field of the magnetically free layer.