Article comprising magnetoresistive material
US5549977A · kind A · utility
67Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1994 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | Apr 15, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1107
Abstract
A magnetoresistance ratio of 200% (absolute value) or more at room temperature in a field of 6T can be achieved in a layer of material of nominal composition XMnO.sub.y (X is La and at least one of Ca, Sr and Ba, y in the range 2-3.5), if, after formation of the layer, the layer is heat treated in an oxygen-rich (O.sub.2 partial pressure greater than that of air) atmosphere, typically in flowing O.sub.2. The temperature and duration of the heat treatment are in the range 300.degree.-850.degree.C. and 10 minutes-12 hours, and are selected to result in the desired ratio of 200% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.