Magnetically soft, high saturation magnetization laminates of iron-cobalt-nitrogen and iron-nickel
US6778358B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Jan 12, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12465
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one aspect, a laminated structure including a first plurality of layers containing primarily-iron FeCoN interleaved with a second plurality of layers containing primarily iron FeNi is disclosed. The structure has an easy axis of magnetization and a hard axis of magnetization, has a magnetic saturation of at least about twenty-three-thousand Gauss, and has a magnetic coercivity measured substantially along its hard axis of magnetization that is less than two Oersted. Additional elements can be added in minority concentrations to form primarily-iron FeCoN layers with increased resistivity. The laminated structure has applicability in various fields in which high saturation magnetization, magnetically soft materials are advantageous, particularly for inductive heads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.