corner
corner
APS » Journals » Phys. Rev. B » Volume 65 » Issue 9
< Previous Article | Next Article >

Phys. Rev. B 65, 094420 (2002) [11 pages]

Observation of the antiferroquadrupolar order in DyB2C2 by resonant x-ray scattering

Download: PDF (777 kB) Buy this article Export: BibTeX or EndNote (RIS)

T. Matsumura, N. Oumi, and K. Hirota
Department of Physics, Tohoku University, Sendai, 980-8578, Japan

H. Nakao and Y. Murakami*
Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, 305-0801, Japan

Y. Wakabayashi†
Department of Physics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan

T. Arima
Institute of Materials Science, University of Tsukuba, Tsukuba, 305-8573, Japan

S. Ishihara‡ and Y. Endoh
Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan

Received 8 October 2001; published 13 February 2002

We have investigated the antiferroquadrupolar (AFQ) order in DyB2C2 by resonant x-ray scattering. X rays with energies near the L3 absorption edge of Dy were employed. Superlattice peaks that correspond to three kinds of propagation vectors of (1 0 0), (1 0 1/2), and (0 0 1/2) were investigated in detail with polarization analyses. The experimental results are analyzed using a formalism of resonant x-ray scattering and a model of the AFQ order. The magnetic and quadrupolar scatterings are explained by the model satisfactorily. A detailed investigation of the critical behavior of the AFQ ordering is also reported. The critical exponent β is deduced to be 0.35, not far from the three-dimensional Heisenberg system. We have also succeeded in detecting the diffuse scattering above TQ.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.65.094420
DOI:
10.1103/PhysRevB.65.094420
PACS:
75.25.+z, 61.10.-i, 71.20.Eh, 75.40.Cx

*Present address: Department of Physics, Tohoku University, Sendai, 980-8578, Japan.

†Present address: Department of Physics, Chiba University, Chiba, 263-8522, Japan.

‡Present address: Department of Applied Physics, University of Tokyo, Tokyo, 113-8656, Japan.

 
< Previous Article | Next Article >