From: Correlation between Al grain size, grain boundary grooves and local variations in oxide barrier thickness of Al/AlOx/Al tunnel junctions by transmission electron microscopy
Sample group
A
B
C
D
\(\hbox {t}_{{\mathrm{ox}}}\) (min)
10
30
\(\hbox {p}_{{\mathrm{ox}}}\) (mbar)
0.01
0.1
\(\langle d \rangle _{{\mathrm{t}}}\) (nm)
125
135
83
82
\(\langle d \rangle _{{\mathrm{b}}}\) (nm)
24
27
29