Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9804016 | Journal of Alloys and Compounds | 2005 | 4 Pages |
Abstract
XAFS measurements of the La L3 and Ni K-edges for LaNi5 were done at temperatures of 20, 100, 200 and 293Â K. The temperature dependences of the Debye-Waller factors eâ2Ï2k2 for La and Ni are deduced. The results show that mean square fluctuation in interatomic distance Ï2 of La for LaNi5 is fairly large and the Debye temperature ÎD of La changes with temperature. These results indicate that the La atom with large atomic size changes its atomic position easily in LaNi5. The large Ï2 value of A (rare earth) elements for AB5 compounds might be correlated to their high capability of the hydrogen absorption and desorption.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
M. Matsuura, K. Asada, K. Konno, M. Sakurai,