Magnetic multilayered films with reduced magnetostriction
US6760198B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2001 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | May 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
It is the primary object of the present invention to provide a shield and pole material with reduced magnetostriction while preserving good magnetic characteristics. This material is used in recording heads in tape and disk drives. The material is a repeating sequence of three layers. One layer is FeX(N) where the (N) indicates a nitrogenated film and the additional element, X, is preferentially Ta but can be selected from a group of elements. Another layer is made from a NiFe alloy. The third layer, disposed between the FeX(N) and NiFe layers is tantalum. The sequence of three layers is repeated to build the required thickness for the final material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.