Magnetic properties of RuO2 and charge-magnetic interference in Bragg diffraction of circularly polarized x-rays

DOI: 10.1103/PhysRevB.105.014403

Authors: S. W. Lovesey (Diamond Light Source) , D. D. Khalyavin (ISIS Facility) , G. Van Der Laan (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 105 , PAGES 014403

State: Published (Approved)
Published: January 2022

Abstract: Rutile-type RuO2 likely supports a simple antiferromagnetic structure which can be verified by x-ray Bragg diffraction. Three magnetic motifs that do not break translation symmetry are explored in calculations of amplitudes suitable for diffraction enhanced by tuning the primary x-ray energy to a ruthenium atomic resonance. Coupling to x-ray helicity through a charge-magnetic interference is common to all motifs, together with magnetic and charge intensities in quadrature in the rotated channel of polarization. Necessary conditions for these diffraction phenomena are a centrosymmetric crystal structure, null magnetic propagation vector, and absence of a linear magnetoelectric effect. Published x-ray diffraction data for RuO2 were analyzed by the authors against a magnetic motif that does not satisfy the conditions. A polarized neutron study of antiferromagnetic domains can be achieved with a sample that meets the stated crystal and magnetic symmetries.

Journal Keywords: Chirality; x-ray scattering

Diamond Keywords: Antiferromagnetism

Subject Areas: Physics, Materials, Mathematics


Technical Areas: Theoretical Physics

Added On: 17/01/2022 09:49

Discipline Tags:

Physics Energy Materials Magnetism Materials Science Theoretical Physics Mathematics

Technical Tags: