We obtained evidence for the partial chemical segregation of as-deposited and hydrogenated films into nanoscale Ti and Mg domains using positron Doppler-broadening. We exclusively monitor the hydrogenation of Mg domains, owing to the large difference in positron affinity for Mg and Ti. The electron momentum distribution broadens significantly upon transformation to the phase over the whole compositional range. This reveals the similarity of the metal-insulator transition for rutile and fluorite . Positron lifetime studies show the presence of divacancies in the as-deposited and hydrogenated Mg-Ti metal films. In conjunction with the relatively large local lattice relaxations we deduce to be present in fluorite , these may be responsible for the fast hydrogen sorption kinetics in this phase.
Skip Nav Destination
Article navigation
22 March 2010
Research Article|
March 22 2010
Divacancies and the hydrogenation of Mg-Ti films with short range chemical order
H. Leegwater;
H. Leegwater
1Department of Radiation, Radionuclides and Reactors, Faculty of Applied Sciences,
Delft University of Technology
, Mekelweg 15, NL-2629 JB Delft, The Netherlands
Search for other works by this author on:
H. Schut;
H. Schut
1Department of Radiation, Radionuclides and Reactors, Faculty of Applied Sciences,
Delft University of Technology
, Mekelweg 15, NL-2629 JB Delft, The Netherlands
Search for other works by this author on:
W. Egger;
W. Egger
2Institut für Angewandte Physik und Messtechnik,
Universität der Bundeswehr München
, Werner-Heisenberg-Weg 39, D-85579 Neubiberg, Germany
Search for other works by this author on:
A. Baldi;
A. Baldi
3Department of Chemical Engineering, Faculty of Applied Sciences,
Delft University of Technology
, Julianalaan 136, NL-2628 BL Delft, The Netherlands
Search for other works by this author on:
B. Dam;
B. Dam
3Department of Chemical Engineering, Faculty of Applied Sciences,
Delft University of Technology
, Julianalaan 136, NL-2628 BL Delft, The Netherlands
Search for other works by this author on:
S. W. H. Eijt
S. W. H. Eijt
a)
1Department of Radiation, Radionuclides and Reactors, Faculty of Applied Sciences,
Delft University of Technology
, Mekelweg 15, NL-2629 JB Delft, The Netherlands
Search for other works by this author on:
a)
Electronic mail: s.w.h.eijt@tudelft.nl.
Appl. Phys. Lett. 96, 121902 (2010)
Article history
Received:
January 13 2010
Accepted:
March 01 2010
Citation
H. Leegwater, H. Schut, W. Egger, A. Baldi, B. Dam, S. W. H. Eijt; Divacancies and the hydrogenation of Mg-Ti films with short range chemical order. Appl. Phys. Lett. 22 March 2010; 96 (12): 121902. https://doi.org/10.1063/1.3368698
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00