Abstract:
A method and system for storing information in a nonvolatile memory comprising: a substrate comprising magnetic material operatively associated therewith, the magnetic material having at least one first portion of low permeability and at least one second portion of high permeability; a reader comprising a sensor for reading information by measuring the magnetic permeability for the at least one first portion and the at least one second portion; whereby the at least one first and second portions are subjected to a magnetic probe field from one of an external source, the sensor, or a combination of an external source and the sensor.