Patent ID: 7772529

Claim:
A system for improving permalloy sensitivity, comprising: a substrate; at least one permalloy sensing component comprised of a material having a high magnetic permeability configured above said substrate; and at least one conductor in thermal communication with and magnetically coupled to a portion of said at least one permalloy sensing component; wherein said system is structured such that a modification current through said at least one conductor heats said portion of said at least one permalloy sensing component to a heated temperature via conduction of heat generated by resistive heating of said at least one conductor and also creates a magnetic field at said portion of said at least one permalloy sensing component, where said heated temperature and said magnetic field collectively are sufficient to modify an anisotropy of said portion of said at least one permalloy sensing component, thereby providing selective anisotropy that persists after cessation of said modification current to improve sensitivity of said system.