Synchrotron and Neutron Users' Group  




Fast Forward to Better DVDs

High-brightness x-rays let us search for important new information about mature technologies such as DVDs.

DVDs are composed of an alloy with three elements: germanium, antimony, tellurium. North Carolina State University researchers used EXAFS at MR-CAT beamline 10-ID to examine this alloy at the microscopic level; bond constraint theory produced optimum ratio of elements within the material

The ability to “fine tune” the alloy could lead to the development of more efficient data storage devices, remotely reconfigurable electronics (e.g., computers sent into orbit and reprogrammed in place as needed)

exafs graphs

Plots of k3-weighted normalized EXAFS
spectra for Ge2Sb2Te5. Solid lines are data; dashed lines are fits.




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