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APS » Journals » Phys. Rev. Lett. » Volume 102 » Issue 15
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Phys. Rev. Lett. 102, 155901 (2009) [4 pages]

Change of Diffusion Mechanism with Lattice Parameter in the Series of Lanthanide Indides Having L12 Structure

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Gary S. Collins, Xia Jiang, John P. Bevington, and Farida Selim
Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USA

Matthew O. Zacate
Department of Physics, Northern Kentucky University, Highland Heights, Kentucky 41099, USA

Received 6 October 2008; published 17 April 2009

Using perturbed angular correlation spectroscopy, jump frequencies of Cd tracer atoms were measured for 12 indides In3B (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.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.155901
DOI:
10.1103/PhysRevLett.102.155901
PACS:
66.30.−h, 76.80.+y, 82.80.Ej
 
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