Question: What is the maximum areal density (data stored over a square inch) of a magnetic storage device made from cobalt (Co) nanoparticle domains? Assume that

What is the maximum areal density (data stored over a square inch) of a magnetic storage device made from cobalt (Co) nanoparticle domains? Assume that the nanoparticles are placed on a planar substrate, are barely touching each other, and are organized in a Cartesian X-Y grid.

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The answer is not 6.45 TB/in^2

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