title: Change of diffusion mechanism with lattice parameter in the series of lanthanide indides having L12 structure.
abstract: Using perturbed angular correlation spectroscopy, jump frequencies of Cd tracer atoms were measured for 12 indides In3(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.
authors.affiliation: Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USA.
authors.forename: Gary S
authors.initials: GS
authors.lastname: Collins
authors.forename: Xia
authors.initials: X
authors.lastname: Jiang
authors.forename: John P
authors.initials: JP
authors.lastname: Bevington
authors.forename: Farida
authors.initials: F
authors.lastname: Selim
authors.forename: Matthew O
authors.initials: MO
authors.lastname: Zacate