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Pushing The Limits Of Hard Disk Storage

Date:
October 10, 2005
Source:
Ecole Polytechnique Fédérale de Lausanne
Summary:
Just how much data can we cram onto a hard disk ? In a paper appearing online today in Physical Review Letters, EPFL (Ecole Polytechnique Federale de Lausanne) Professor Harald Brune and his colleagues report what they believe to be the ultimate density limit of magnetic recording.
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Just how much data can we cram onto a hard disk? In a paper appearingonline today in Physical Review Letters, EPFL (Ecole PolytechniqueFederale de Lausanne) Professor Harald Brune and his colleagues reportwhat they believe to be the ultimate density limit of magneticrecording.

His group created a self-assembled lattice of non-interactingtwo-atoms-high islands of cobalt on a single-crystal gold substrate.The islands' density -- 26 trillion islands per square inch -- is thehighest yet recorded and 200 times the bit density of current computerhard disks. The magnetic properties of the islands are the most uniformever recorded, and because the islands don't interact with each other,they can each hold one bit of data.

However, it's not a storage medium "ready to use" because theserecords were posted at the uncomfortably cold temperature of -223 C!Above this temperature, thermal excitation starts to reverse themagnetization and the information in the memory gets volatile.

Brune and his colleagues are still trying to solve this blockingtemperature problem using bi-metallic islands of 500-800 atoms that canmaintain the desired magnetic properties at room temperature.

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On the web: http://ipn2.epfl.ch/LNS/index.htm.


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The above post is reprinted from materials provided by Ecole Polytechnique Fédérale de Lausanne. Note: Materials may be edited for content and length.


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Ecole Polytechnique Fédérale de Lausanne. "Pushing The Limits Of Hard Disk Storage." ScienceDaily. ScienceDaily, 10 October 2005. <www.sciencedaily.com/releases/2005/10/051010095854.htm>.
Ecole Polytechnique Fédérale de Lausanne. (2005, October 10). Pushing The Limits Of Hard Disk Storage. ScienceDaily. Retrieved August 2, 2015 from www.sciencedaily.com/releases/2005/10/051010095854.htm
Ecole Polytechnique Fédérale de Lausanne. "Pushing The Limits Of Hard Disk Storage." ScienceDaily. www.sciencedaily.com/releases/2005/10/051010095854.htm (accessed August 2, 2015).

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