Magnetic transducer, thin film magnetic head and method of manufacturing the same
US6545848B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2000 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Jul 1, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic transducer and a thin film magnetic head capable of suppressing a reduction in reproducing output and of obtaining an appropriate bias magnetic field and a method of manufacturing the same. An MR element comprises a stack sensing an external magnetic field and magnetic domain control films applying a bias magnetic field to the stack. The magnetic domain control films are fabricated with a stack of magnetic domain control ferromagnetic films made of a ferromagnetic material and magnetic domain control antiferromagnetic films made of an antiferromagnetic material. The magnetic domain control ferromagnetic films are fabricated to have the magnetostriction &lgr;s within a range of −15×10−6<&lgr;s<0. The magnetostriction &lgr;s in such a range suppresses increase in hysteresis in a change of the magnetization of the magnetic domain control ferromagnetic film to an external magnetic field. The magnetic domain control ferromagnetic films always produce a constant bias magnetic field. As a result, output from the stack becomes stable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.