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Elucidation of the helical spin structure of FeAs

DOI: 10.1103/PhysRevB.95.064424 DOI Help

Authors: T. Frawley (Durham University) , R. Schoonmaker (Durham University) , S. H. Lee (Tamkang University) , C.-h. Du (Tamkang University) , P. Steadman (Diamond Light Source) , J. Strempfer (DESY) , Kh. A. Alziq (King Fahd University of Petroleum and Minerals) , S. J. Clark (Durham University) , T. Lancaster (Durham University) , P. D. Hatton (University of Durham)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 95

State: Published (Approved)
Published: February 2017
Diamond Proposal Number(s): 6422

Abstract: 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.

Subject Areas: Physics

Instruments: I10-Beamline for Advanced Dichroism

Other Facilities: ESRF; DESY