Multi-layer magnetic memory cells with improved switching characteristics

摘要

A plurality of layers of magnetic material are stacked in parallel, overlying relationship and separated by layers of non-magnetic material so as to form a multi-layer magnetic memory cell. The width of the cell is less than a width of magnetic domain walls within the magnetic layers so that magnetic vectors in the magnetic layers point along a length of the magnetic layers, and the ratio of the length to the width of the magnetic memory cell is in a range of 1.5 to 10. The magnetic layers are antiferromagnetically coupled when the ratio is less than 4 and ferromagnetically coupled when the ratio is greater than 4.