1. Johannes Eisenmenger and Ivan K. Schuller are at the University of California-San Diego, Department of Physics, La Jolla, California 92093-0319, USA.

Correspondence to: Ivan K. Schuller¹ e-mail: ischuller@ucsd.edu

Abstract

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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