Chirality and magnetic quadrupole order in Pb(TiO)Cu4(PO4)4 probed by interference scattering in resonant x-ray diffraction

R. Misawa, H. Ueda, K. Kimura, Y. Tanaka, and T. Kimura
Phys. Rev. B 103, 174409 – Published 10 May 2021

Abstract

Circular dichroism observed by resonant x-ray diffraction at the CuL3 edge was investigated in a chiral antiferromagnet, Pb(TiO)Cu4(PO4)4, which shows magnetic quadrupole order (TN=7K). At temperatures above TN, space-group-forbidden reflection 100 is observed due to the anisotropic tensor of susceptibility (ATS) scattering. With decreasing temperature, the reflection intensity shows substantial circular dichroism below TN. We found one-to-one correspondence between the sign of the circular dichroism and that of the sample's crystallographic chirality. In addition, the reflection intensity depends on the product of poling magnetic and electric fields. The circular dichroism observed in this study is interpreted as the interference between the ATS and the magnetic scatterings. This finding shows that the interference scattering probes both the chirality and the order parameter of the magnetic quadrupole order in this chiral antiferromagnet.

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  • Received 19 March 2021
  • Revised 20 April 2021
  • Accepted 23 April 2021

DOI:https://doi.org/10.1103/PhysRevB.103.174409

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

R. Misawa1, H. Ueda2, K. Kimura1, Y. Tanaka3, and T. Kimura1

  • 1Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
  • 2Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
  • 3RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan

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Issue

Vol. 103, Iss. 17 — 1 May 2021

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