Magneto-impedance element, and magnetic head, thin film magnetic head, azimuth sensor and autocanceler using the same
US6183889A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 27, 1998 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-impedance element, showing a change in impedance in response to an external magnetic field when an alternating current is applied, is composed of a glassy alloy. The glassy alloy is composed of at least one base metal selected from the group consisting of Fe, Co and Ni; at least one additional metal selected from the group consisting of Zr, Nb, Ta, Hf, Mo, Ti and V; and B. The glassy alloy has a temperature region .DELTA.T.sub.x, of the supercooling liquid zone of 20.degree. C. or more which is represented by the equation .DELTA.T.sub.x =T.sub.x -T.sub.g wherein T.sub.x is the crystallization temperature and T.sub.g is the glass transition temperature. A magnetic head, a thin film magnetic head, an azimuth sensor and an autocanceler are provided with the MI element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.