Patent ID: 8391056
Filing Date: 2013-03-05
Classification: G11C

Abstract:
1. A magnetic storage device comprising: a network of flat magnetic cells on a substrate, the dimensions of each magnetic cell being chosen such that the cell is in a vortex state, a vortex core of each cell having a magnetization with a first and second equilibrium position in the opposite direction and roughly perpendicular to a plane of said cell, each of said two positions representing a piece of binary information; means for writing binary information stored in the cells, said means of writing including means for selectively and simultaneously applying the following in the vicinity of each cell: a first static magnetic field with roughly perpendicular bias to said plane; a radio frequency magnetic field with linear polarization, including two right and left circular polarization roughly parallel to said plane, such that: a simultaneous application of said first static magnetic field and said radio frequency magnetic field at a first frequency on the selected cell causes: a simultaneous application of said first static magnetic field and said radio frequency magnetic field at a second frequency that is different than said first frequency on the selected cell causes: