Patent ID: 7123505
Filing Date: 2006-10-17
Classification: G11C

Abstract:
1. A method of reading information in a magnetic tunnel junction (MTJ) of a magnetic memory, the method comprising: applying an electromagnetic field to the MTJ that is sufficient to cause a change in the electrical resistance of the MTJ, wherein the change in the electrical resistance of the MTJ is at least substantially removed responsive to removal of the applied electromagnetic field; measuring the change in the electrical resistance of the MTJ associated with the application of the electromagnetic field to the MTJ; and determining information in the MTJ based on the measured change in the electrical resistance of the MTJ, wherein the MTJ comprises a free layer, and wherein the applied electromagnetic field is sufficiently large to distort the free layer from a first magnetic polarization state to a second magnetic polarization state, and is sufficiently low so that the free layer at least substantially reverts back to the first magnetic polarization state responsive to removal of the applied electromagnetic field.