DAFS - Universidad de Zaragoza
DAFS - Universidad de Zaragoza
DAFS - Universidad de Zaragoza
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Spatial selectivity : GaAs xP 1-x/GaAs epilayer<br />
GaAsP/GaAs thin film, (006) weak reflection, FWHM=0.02°<br />
Quick <strong>DAFS</strong>, assisted with feedback : 2000eV, 7 minutes !!<br />
Diffracted Intensity<br />
Intensité normalisée<br />
Χ(k)<br />
0.2<br />
0.1<br />
0<br />
0.05<br />
χ(k)<br />
0<br />
-0.05<br />
<strong>DAFS</strong><br />
Ga Kedge<br />
10500 11000 11500 12000<br />
Energie (eV)<br />
200ms/pt<br />
Energy<br />
4 6 8 10 12 14 16<br />
k (Å -1 k(Å ) -1 )<br />
As Kedge<br />
10 ms/pt<br />
E<strong>DAFS</strong> oscillations<br />
Ga Kedge<br />
0.2<br />
-0.2<br />
0<br />
0.2<br />
-0.2<br />
0.2<br />
-0.2<br />
-0.2<br />
(006) reflection, Ga K-edge<br />
0.2<br />
0<br />
0<br />
0<br />
2 4 6 8 10 12<br />
k (Å -1 )<br />
k(Å-1 )<br />
FT<br />
ε = 0.4%<br />
[110]<br />
ε = 0.6%<br />
[110]<br />
ε = 0.7%<br />
[110]<br />
t=4000Å<br />
ε = 0.7%<br />
-<br />
[110]<br />
t=600Å<br />
0 1 2 3 4 5 6<br />
R (Å -1 )<br />
R(Å)<br />
16/50
Change language