Accession Number : ADD015146

Title :   Heterogeneous Magnetoresistive Layer.

Descriptive Note : Patent, Filed 13 Aug 90, patented 27 Aug 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Edelstein, Alan S

Report Date : 27 Aug 1991

Pagination or Media Count : 7

Abstract : A magnetoresistive material includes discrete units of magnetostrictive material separated from one another by one or more gaps. In one class of embodiments, magnetostrictive particles are embedded in a phase-separated nonmagnetostrictive matrix. In one embodiment a magnetoresistive article is made by co-sputtering particles of a magnetostrictive material and a quantity of a nonmagnetostrictive material onto an nonmagnetostrictive substrate. The magnetostrictive particles are spaced from one another by distances in the range of 10 to 100 angstroms. In another embodiment, a magnetoresistive article is made by employing relatively large magnetostrictive electrodes separated by a small gap on a nonmagnetostrictive substrate. Magnetic field sensors employing such articles are also provided.

Descriptors :   ELECTRODES, MAGNETIC DETECTORS, MAGNETIC FIELDS, MAGNETOSTRICTION, MATERIALS, PARTICLES, SUBSTRATES

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE