GMR spin-valve element evaluation method, magnetic head manufacturing method, and magnetic storage device
US7525771B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jul 21, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for evaluating a magnetized state of a pinned layer of a magnetoresistive spin-valve element used, together with a recording element, in a magnetic head, is provided. The method includes the steps of (a) supplying a first alternating current to the recording element, while supplying a second current for generating a magnetic field to the spin-valve element, the direction of the magnetic field generated by the second current being opposite to a prescribed direction of magnetization of the pinned layer adjacent to an antiferromagnetic layer; and (b) determining whether the magnetization of the pinned layer is inverted toward said direction opposite to the prescribed direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.