Compound core element having a pair of uniaxial anisotropic ferromagnetic cell components with different coercive field strength for a thin film sensor
US5128614A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Apr 30, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic-field-sensitive device includes several magnetic-field sensors. Each sensor comprises a compound element surrounded by a coil winding. Each compound element is made of two ferromagnetic cell components extending in one axial direction with uniaxial magnetic anisotropy and with different coercive field strengths. A spontaneous reversal of magnetization is produced by an external magnetic switching field only in the cell component having the lower coercive field strength. The magnetic-field sensors are combined to form a series arrangement, or array, and the coil windings and cell components of the magnetic-field sensors of the array are formed as thin-film structures on a non-magnetic substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.