Magnetic head assembly and magnetic recording/reproducing apparatus
US8320079B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2009 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Feb 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
It is made possible to reduce the write magnetic field generated from the main magnetic pole toward the spin torque oscillator, so as to reduce the variation in the oscillation characteristics of the spin torque oscillator, and reduce the current required for oscillation. The magnetic head assembly includes: a recording magnetic pole; a spin torque oscillator that has first and second magnetic layers, and an intermediate layer interposed between the first and second magnetic layers, the spin torque oscillator generating a high-frequency magnetic field by applying a current between the first and second magnetic layers; and a third magnetic layer that is placed adjacent to at least part of a side face of the second magnetic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.