The storage density of computer hard drives has increased to the point that magnetic recording media is cheaper than paper. Yet there are limits to this technology. As they decrease in size, magnetic 'bits' become thermally unstable, providing a challenge to further miniaturization.
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Eisenmenger, J., Schuller, I. Overcoming thermal fluctuations. Nature Mater 2, 437–438 (2003). https://doi.org/10.1038/nmat934
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DOI: https://doi.org/10.1038/nmat934
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