Patent ID: 7829962
Filing Date: 2010-11-09
Classification: B82Y,G01R,H01F,H01L

Abstract:
1. A magnetic device comprising a spin valve, said spin valve comprising a plurality of layers arranged in a stack which in turn comprises at least one free magnetic layer able to be associated to a temporary magnetisation (MT), a spacer layer and a permanent magnetic layer associated to a permanent magnetisation (MP), wherein said spacer layer is obtained according to a method of manufacturing a magnetoresistive element comprising regions having metallic conduction and regions having semi-conductive conduction wherein said method comprises the following operations: forming metallic nanoparticles to obtain said regions with metallic conduction; providing a semiconductor substrate; chemically etching the semiconductor substrate to form pores in said semiconductor substrate; and applying said metallic nanoparticles to said semiconductor substrate having pores in order to obtain a disordered mesoscopic structure, wherein said spacer layer comprises a matrix and nanoparticles, said matrix being a matrix of nano-porous material obtained by electrochemical assembly, and wherein said matrix comprises a porous dielectric material comprising porous silicon, and the nanoparticles are contained in pores of said porous dielectric material.