Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

8-1-2016

Journal or Book Title

Physical Review B

Volume

94

Issue

6

First Page

060103

DOI

10.1103/PhysRevB.94.060103

Abstract

We report on the six-dimensional (6D) structural refinement of three members of the i-R-Cd quasicrystals (R = Gd, Dy, Tm) via synchrotron x-ray diffraction from single-grain samples, and show that this series is isostructural to the i-YbCd5.7 quasicrystal. However, our refinements suggest that the R occupancy on the Yb icosahedron sites within the Tsai-type atomic cluster is approximately 80%, with the balance taken up by Cd. Similarities between the i-R-Cd series and i-ScZn7.33, and their differences with i-YbCd5.7 and i-Ca15Cd85, indicate that there are at least two subclasses of Tsai-type icosahedral quasicrystals. We further show from x-ray resonant magnetic scattering (XRMS) measurements on a set of closely related Tb1−xYxCd6 1/1 approximants that the dilution of the magnetic R ions on the icosahedron within the Tsai-type cluster by nonmagnetic Y disrupts the commensurate magnetic ordering in the approximant phase.

Comments

This article is published as Yamada, T., H. Takakura, T. Kong, P. Das, W. T. Jayasekara, A. Kreyssig, G. Beutier, P. C. Canfield, M. De Boissieu, and A. I. Goldman. "Atomic structure of the i-R-Cd quasicrystals and consequences for magnetism." Physical Review B 94, no. 6 (2016): 060103. DOI: 10.1103/PhysRevB.94.060103. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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