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)
Plots of k3-weighted normalized EXAFS spectra for Ge2Sb2Te5. Solid lines are data; dashed lines are fits.
REFERENCES: Phys. Rev. Lett.,96, 255501 (2006)
Work performed at the Argonne National Laboratory.