Hydrogen distribution in Nb/Ta superlattices.
The distribution of hydrogen in Nb/Ta superlattices has been investigated by combined neutron reflectivity and x-ray scattering. We provide evidence to support that strain modulations determined with x-ray diffraction can be interpreted as modulations in hydrogen content. We show that the hydrogen concentration is modulated and favors Nb, in agreement with previous studies. We measure the concentration directly using neutron reflectivity and demonstrate no detectable change in the distribution of hydrogen with temperature, in stark contrast to previous studies.
Division of Materials Physics, Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden. max.wolff@physics.uu.se
Max
M
Wolff
Gunnar K
GK
Pálsson
Panagiotis T
PT
Korelis
Joseph A
JA
Dura
Charles
C
Majkrzak
Björgvin
B
Hjörvarsson