Magneto-optical element and optical magnetic field sensor using the same
US5691837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Mar 14, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F10/245
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magneto-optical element comprises a film of a Bi-substituted rare earth iron garnet selected from garnets of the following chemical formulas EQU (Bi.sub.x Gd.sub.y R.sub.z Y.sub.3-x-y-z)(Fe.sub.5-w Ga.sub.w)O.sub.12 wherein R represents at least one element selected from the group consisting of rare earth elements other than Gd, and x, y, z and w are such that 1.00.ltoreq.x.ltoreq.1.30, 0.42.ltoreq.y.ltoreq.0.60, 0.01.ltoreq.z.ltoreq.0.05 and 0.40.ltoreq.w.ltoreq.0.62, and EQU (Bi.sub.x 'Gd.sub.y 'R.sub.z 'Y.sub.3-x'-y'-z')Fe.sub.5 O.sub.12 wherein R is as defined above, and x', y' and z' are such that 1.10.ltoreq.x'.ltoreq.1.30, 1.00.ltoreq.y'.ltoreq.1.80, 0.ltoreq.z'.ltoreq.0.06. An optical magnetic field sensor capable of detecting zeroth to higher order beams of diffracted light is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.