Antiferromagnetic storage device
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United States of America Patent
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May 17, 2016
Grant Date -
Jul 3, 2014
app pub date -
Mar 4, 2014
filing date -
Sep 15, 2011
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Abstract
An atomic-scale structure according to one embodiment has a net magnetic moment of zero or about zero, two or more stable magnetic states, and an array of atoms that has magnetic moments that alternate between adjacent magnetic atoms along one or more directions. Such structures may be used to store data at ultra-high densities. An antiferromagnetic nanostructure according to another embodiment includes multiple arrays each corresponding to a bit. Each array has at least eight antiferromagnetically coupled magnetic atoms. Each array has at least two readable magnetic states that are stable for at least one picosecond. Each array has a net magnetic moment of zero or about zero. No external stabilizing structure exerts influence over the arrays for stabilizing the arrays. Each array has 100 atoms or less along a longest dimension thereof.
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