Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

8-1-2013

Journal or Book Title

Physical Review B

Volume

88

Issue

5

First Page

054413

DOI

10.1103/PhysRevB.88.054413

Abstract

Recent theoretical efforts aimed at understanding the nature of antiferromagnetic ordering in GdNi2B2C predicted double-q ordering. Here we employ resonant elastic x-ray scattering to test this theory against the formerly proposed, single-q ordering scenario. Our study reveals a satellite reflection associated with a mixed-order component propagation wave vector, viz., (qa,2qb,0) with qb=qa≈0.55 reciprocal lattice units, the presence of which is incompatible with single-q ordering but is expected from the double-q model. A (3qa,0,0) wave vector (i.e., third-order) satellite is also observed, again in line with the double-q model. The temperature dependencies of these along with that of a first-order satellite are compared with calculations based on the double-q model and reasonable qualitative agreement is found. By examining the azimuthal dependence of first-order satellite scattering, we show the magnetic order to be, as predicted, elliptically polarized at base temperature and find the temperature dependence of the “out of a-b plane” moment component to be in fairly good agreement with calculation. Our results provide qualitative support for the double-q model and thus in turn corroborate the explanation for the “magnetoelastic paradox” offered by this model.

Comments

This article is published as Normile, P. S., Martin Rotter, C. Detlefs, Jens Jensen, P. C. Canfield, and J. A. Blanco. "Magnetic ordering in GdNi 2 B 2 C revisited by resonant x-ray scattering: Evidence for the double-q model." Physical Review B 88, no. 5 (2013): 054413. DOI: 10.1103/PhysRevB.88.054413. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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