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Calculated chemical potential diagram of vs at 298 °C and 1 atm. Al composition is in terms of mole fractions of Al in Al and Co only. Oxygen potentials are dimensionless since they are normalized by RT, with R as the gas constant and T the absolute temperature. Calculated using data given elsewhere (see Ref. 1).
Co photoelectron peaks from (a) pure Co–Fe, (b) Co–Fe subjected to , and (c) Co–Fe subjected to .
Al photoelectron peaks from 1-nm-thick Al layers. (a) Pure Al deposited at 25 °C. (b) Pure Al deposited at 200 °C. (c) Same sample as (b) measured several weeks later. (d) Al subjected to 500 Torr of for 2.5 h at 270 °C. (e) Al subjected to 450 Torr of for 7.5 h at 225 °C. (f) Al subjected to 20 mTorr of for 10 min at 25 °C.
FTIR absorbance data. The peaks indicate the presence of Al–O bonds. (a) Oxidized in , (b) repeatability check with oxidized sample after a few weeks, (c) oxidized in , 270 °C, 500 Torr, 2.5 h, (d) oxidized in , 225 °C, 450 Torr, 7.5 h. An unoxidized, pure Al sample was used for background subtraction. Identical points were chosen for base line correction in each case. The peaks are shifted with respect to one another for display purposes; however, the absorbance scale is identical for each curve.
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