Change of Diffusion Mechanism with Lattice Parameter in the Series of Lanthanide Indides Having L1{sub 2} Structure

Using perturbed angular correlation spectroscopy, jump frequencies of Cd tracer atoms were measured for 12 indides In{sub 3}B (B=rare earth) in paired samples having compositions at each of the opposing phase boundaries. Jump frequencies in heavy lanthanide indides were observed to be smaller for In...

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Bibliographic Details
Published in:Physical review letters 2009-04, Vol.102 (15)
Main Authors: Collins, Gary S., Jiang, Xia, Bevington, John P., Selim, Farida, Zacate, Matthew O., Department of Physics, Northern Kentucky University, Highland Heights, Kentucky 41099
Format: Article
Language:English
Subjects:
DIFFUSION
LATTICE PARAMETERS
MATERIALS SCIENCE
PERTURBED ANGULAR CORRELATION
RARE EARTHS
SPECTROSCOPY
VACANCIES
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Summary:Using perturbed angular correlation spectroscopy, jump frequencies of Cd tracer atoms were measured for 12 indides In{sub 3}B (B=rare earth) in paired samples having compositions at each of the opposing phase boundaries. Jump frequencies in heavy lanthanide indides were observed to be smaller for In-richer compositions than for In-poorer compositions, but greater in the light lanthanide indides. These findings signal an unmistakable change in diffusion mechanism from the simple In-sublattice vacancy mechanism for heavy lanthanides to a B-vacancy mechanism for light lanthanides.
ISSN:0031-9007
1079-7114
DOI:10.1103/PHYSREVLETT.102.155901