Patent ID: 6316131
Filing Date: 2001-11-13
Classification: B82Y,G01R,G11B,Y10S,Y10T

Abstract:
A sensor device for detecting information recorded on a moving medium, wherein said information is recorded in the form of magnetized portions of said medium, said sensor device comprising:magnetic shields;an electrical conductor carrying a current and providing a magnetic field; anda magnetoresistance sensor disposed between said magnetic shields and adjacent said electrical conductor and said moving medium, wherein said magnetoresistance sensor is biased by said magnetic field and is responsive to the magnetized portions of said medium for providing an output representing the recorded information, wherein said magnetoresistance sensor is comprised of a doped silver chalcogenide having the composition:A.sub.2+.delta. XwhereA=Ag or Cu, or a mixture thereof;X=Se or Te, or a mixture thereof; and0.01<.delta.<0.33.