APS » PROLA » Phys. Rev. B » Volume 64 » Issue 21

Phys. Rev. B 64, 212407 (2001) [3 pages]

Resonant x-ray scattering at the As and Se K edges in U(As1-xSex) solid solutions

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M. J. Longfield
Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom

D. Mannix and G. H. Lander
European Commission, JRC, Institute for Transuranium Elements, Postfach 2340, D-76125 Karlsruhe, Germany

A. Stunault *
XMaS CRG at ESRF, Boîte Postale, 220, F-38043, Grenoble, France
Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom

Received 12 June 2001; published 14 November 2001

We report on experiments at the K edges of As and Se on single crystals of three compositions within the solid solutions U(As1-xSex). These materials are all antiferromagnetic with the principal magnetic moment on the uranium ion. The enhancement of intensity over the weak nonresonant (energy-independent) signal is similar at both the K edges of As and Se. The polarization and energy dependence of the scattering is similar to that observed previously in pure UAs [D. Mannix et al., Phys. Rev. Lett. 86, 4128 (2001)], suggesting a dipole signal associated with the anion 4p states.


©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v64/e212407
DOI: 10.1103/PhysRevB.64.212407
PACS: 75.25.+z

* Present address: Institut Laue Langevin, 156X, 38042 Grenoble, France.

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