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Nature 428, 808-809 (22 April 2004) | doi:10.1038/428808a
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Applied physics: Speed limit ahead
C. H. Back & D. Pescia
Abstract
Are there any limits to what science and technology can achieve? When it comes to recording data in magnetic media, the answer is yes: there is a natural limit to the speed at which data can be encoded.
In magnetic recording, information 'bits' are stored in regions of a magnetic material as opposite magnetizations or spins, corresponding to the values '1' and '0'. High information density is a major requirement, but even the highest density is useless if the information cannot be stored and retrieved sufficiently quickly.
- C. H. Back is at the Institut für Experimentelle und Angewandte Physik, University of Regensburg, Universitätsstrasse 31, 93040 Regensburg, Germany.
e-mail: Email: christian.back@physik.uni-regensburg.de - D. Pescia is at the Laboratorium für Festkörperphysik, ETH Zürich, CH-8093 Zürich, Switzerland.
e-mail: Email: pescia@solid.phys.ethz.ch
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