The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 1996
Filed:
Sep. 26, 1994
Rittmar Von Helmolt, Erlangen, DE;
Joachim Wecker, Roettenbach, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A magnetoresistive sensor may be constructed with material having a perovskite-like crystal structure and an increased magnetoresistive effect. The material is based on the composition (A1).sub.1-x (A2).sub.x MnO.sub.z, with A1 (trivalent) selected from Y, La, or a lanthanide, A2 (bivalent) from an alkaline-earth metal or Pb, and with 0.1.ltoreq.x.ltoreq.0.9 and 2.0.ltoreq.z.ltoreq.3.5. The sensor contains a layer system with at least two layers with different materials, but in each case in the context of the aforesaid composition, which is selected so that the temperature correlation of the electrical resistance is relatively small. The two layers of the layer system can also be united into a single layer structure with a concentration gradient.