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Scientists of St Pölten University of Applied Sciences (Austria), Vienna University of Technology (Austria) and The University of Sheffield (UK) found a new way to increase the storage capacity of hard disks by going three-dimensional.
A hard disk stores data in plane. Within recent years progress was made in increasing the number of bits per square inch. However there is a natural limit and bits cannot be packed too closely. Thomas Schrefl (St. Pölten University of Applied Sciences) and Dieter Suess (Vienna Universty of Technology) propose to store the data in three-dimensions. They use two or more magnetic layers within a single platter of a hard disk. The different layers can be addressed selectively for writing and reading: Data is stored 3D which offer room for high storage capacities as a each layer has a thickness of a few nanometers only. The results of this international collaboration between three Universities was published in the internationally highly ranked Journal Applied Physics Letters (vol 29, no 23, 8 Juni 2009). Increasing the storage capacity of a single hard drive is green technology. Server farms and storage centers need less hard drives to store the same amount of data and can save a lot of energy.
Presentation at the INTERMAG 2009
Thomas Schrefl participated with a series of scientific contributions on The International Magnetics Conference INTERMAG 2009, which took place in Sacramento, California, USA, from May 4 to May 8, 2009. Intermag is the worldwide most important conference on applied magnetics. During the Conference scientists and engineers from all over to world met and discussed novel developments in magnetics, magnetic materials and associated technologies.
The works presented by Thomas Schrefl focussed on the micromagnetics and multiscale modelling, magnetic recording physics and magnetic nanowires, clusters and nanoparticles and are the results of projects carried out with his various international partners.
Download article "Microwave-assisted three-dimensional multilayer magnetic recording"
(Picture: aboutpixel.de/Don-Dimon)
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