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On the magnetic structure of Sr3Ir2O7: an x-ray resonant scattering study

DOI: 10.1088/0953-8984/24/31/312202 DOI Help

Authors: S. Boseggia (Diamond Light Source) , R. Springell (University of Bristol) , H. C. Walker (ISIS) , A. T. Boothroyd (University of Oxford) , D. Prabhakaran (University of Oxford, U.K.) , S. P. Collins (Diamond Light Source) , D. F. Mcmorrow (University College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Physics: Condensed Matter , VOL 24 (31)

State: Published (Approved)
Published: August 2012
Diamond Proposal Number(s): 7797

Abstract: This report presents azimuthal dependent and polarization dependent x-ray resonant magnetic scattering at the Ir L3 edge for the bilayered iridate compound Sr3Ir2O7. The two magnetic wave vectors, ${\mathbf{k}}_{1}=(\frac{1}{2},\frac{1}{2},0)$ and ${\mathbf{k}}_{2}=(\frac{1}{2},-\frac{1}{2},0)$, result in domains of two symmetry-related G-type antiferromagnetic structures, denoted A and B, respectively. These domains are approximately 0.02 mm2 and are independent of the thermal history. An understanding of this key aspect of the magnetism is necessary for an overall picture of the magnetic behaviour in this compound. The azimuthal and polarization dependence of the magnetic reflections, relating to both magnetic wavevectors, show that the Ir magnetic moments in the bilayer compound are oriented along the c axis. This contrasts with single layer Sr2IrO4 where the moments are confined to the ab plane.

Journal Keywords: Transition Metal Oxide; Spin-Orbit Coupling; Magnetic Domains; Iridates; Antiferromagnetism; Iridium Compounds; Layers; Magnetic Moments; Oxygen Compounds; Polarization; Reflection; Resonance Scattering; Strontium Compounds; Symmetry; X Radiation

Subject Areas: Physics, Materials, Chemistry

Instruments: I16-Materials and Magnetism