molecular schematics showing protection from oxidation (IMAGE)
Caption
These molecular diagrams compare the oxidation of native tantalum (Ta), left, in which the oxide penetrates the Ta lattice, with that of tantalum coated with an ultrathin layer of magnesium (Mg), right. Mg acts as an oxygen barrier, effectively suppressing Ta oxidation, and pulls impurities from Ta. Both improve the superconducting properties of the underlaying Ta thin film—shown in the graphs as a sharper transition to superconductivity at a higher temperature.
Credit
(Brookhaven National Laboratory)
Usage Restrictions
OK for use with stories about this research.
License
Original content