Write track shift control in shingled-microwave-assisted magnetic recording (MAMR-SMR)
US8553507B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2012 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Nov 13, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a magnetic data storage system includes a magnetic disk medium, a microwave-assisted magnetic recording (MAMR) head including a main pole adapted for recording data to the magnetic disk medium having a first recording width, a spin torque oscillator (STO) adapted to apply a high-frequency magnetic field to the magnetic disk medium during a recording operation, wherein the STO is operable or inoperable when in an on or off state, respectively, wherein the main pole has a second recording width when the STO is in the on state, and the second recording width is different from the first recording width, a drive mechanism for passing the magnetic disk medium over the MAMR head, a read head including a magnetoresistance sensor, and a controller adapted for adjusting a shift quantity of the magnetic head depending on whether the STO is in the on or off state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.