MAGNETIC VORTEX STORAGE DEVICE

摘要

This invention relates to a magnetic storage device (1) comprising a network of planar magnetic cells (4) in a vortex state, each cell's vortex core having a magnetization with either a first and second equilibrium position in opposite direction and perpendicular to the cellular (4) plane, each of the two positions representing binary information. The device (1) comprises means (5, 8a, 8b, 3) for writing binary information stored in the cells, including means for selectively applying, in the vicinity of each cell (4), a first bias static magnetic field roughly perpendicular to the said cellular (4) plane and a linearly polarized radio frequency magnetic field roughly parallel to said device (4). The described device also comprises means for reading preferably resonantly the polarity using a selective transport measurement between two intersecting electrodes (6) and (9) by guiding the current lines through the region around the vortex core by means of a point contact (7).