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Elucidation of the helical spin structure of FeAs.

Frawley, T. and Schoonmaker, R. and Lee, S. H. and Du, C.-H. and Steadman, P. and Strempfer, J. and Ziq, Kh. A. and Clark, S. J. and Lancaster, T. and Hatton, P. D. (2017) 'Elucidation of the helical spin structure of FeAs.', Physical review B., 95 (6). 064424.


We present the results of resonant x-ray scattering measurements and electronic structure calculations on the monoarsenide FeAs. We elucidate details of the magnetic structure, showing the ratio of ellipticity of the spin helix is larger than previously thought, at 2.58(3), and reveal both a right-handed chirality and an out-of-plane component of the magnetic moments in the spin helix. We find that electronic structure calculations and analysis of the spin-orbit interaction are able to qualitatively account for this canting.

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Publisher statement:Reprinted with permission from the American Physical Society: Frawley, T., Schoonmaker, R., Lee, S. H. Du, C.-H. Steadman, P. Strempfer, J. Ziq, Kh. A. Clark, S. J., Lancaster, T. & Hatton, P. D. (2017). Elucidation of the helical spin structure of FeAs. Physical Review B 95(6): 064424 © 2017 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:22 February 2017
Date deposited:03 March 2017
Date of first online publication:22 February 2017
Date first made open access:03 March 2017

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