Periodic arrangement of quadrupolar moments induced by the antiferromagnetic order in TbB2C2: Observation by resonant X-ray scattering

Daisuke Okuyama, Takeshi Matsumura, Hironori Nakao, Youichi Murakami, Hideya Onodera, Aya Tobo, Yusuke Wakabayashi, Hiroshi Sawa

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7 Citations (Scopus)


We have investigated the antiferromagnetic ground state, phase IV, of TbB2C2 by resonant X-ray scattering to study the background of its anomalous magnetic structure. Polarization analysis was carried out to clarify the origin of the superlattice and forbidden reflections that appear below the Néel temperature. We observed magnetic reflections of (1 0 0.5) and (0 0 0.5), consistently with the neutron diffraction experiment by Kaneko et al. In addition, we have detected the (1 0 0) forbidden reflection in the unrotated σ-σ′ channel, which was not observed by neutron diffraction. From the detailed analysis of the resonant X-ray scattering, we conclude that this reflection originates from the ordering of the quadrupolar moment that accompany the canted antiferromagnetic structure of TbB2C2 because of the strong spin-orbit coupling. No lattice distortion was detected.

Original languageEnglish
Pages (from-to)1566-1571
Number of pages6
JournalJournal of the Physical Society of Japan
Issue number5
Publication statusPublished - 2005 May 1


  • Canting angle
  • Quadrupole order
  • Resonant X-ray scattering
  • TbBC

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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