Temperature-Dependent Cycloidal Magnetic Structure in GdRu2Al10 Studied by Resonant X-ray Diffraction

Journal of the Physical Society of Japan Volume 86 Issue 9 Page 094709-1-094709-8 published_at 2017-08-30
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Title ( eng )
Temperature-Dependent Cycloidal Magnetic Structure in GdRu2Al10 Studied by Resonant X-ray Diffraction
Creator
Yamamoto Takayoshi
Source Title
Journal of the Physical Society of Japan
Volume 86
Issue 9
Start Page 094709-1
End Page 094709-8
Abstract
We have performed resonant X-ray diffraction experiments on the antiferromagnet GdRu2Al10 and have clarified that the magnetic structure in the ordered state is cycloidal with the moments lying in the bc-plane and propagating along the b-axis. The propagation vector shows a similar temperature dependence to the magnetic order parameter, which can be interpreted as being associated with the gap opening in the conduction band and the resultant change in the magnetic exchange interaction. Although the S = 7/2 state of Gd is almost isotropic, the moments show slight preferential ordering along the b-axis. The c-axis component in the cycloid develops with decreasing temperature through a tiny transition in the ordered phase. We also show that the scattering involves the σ–σ′ process, which is forbidden in normal E1–E1 resonance of magnetic dipole origin. We discuss the possibility of the E1–E2 resonance originating from a toroidal moment due to the lack of inversion symmetry at the Gd site. The spin-flop transition in a magnetic field is also described in detail.
Descriptions
This work was supported by JSPS KAKENHI Grant Number 15K05175. The synchrotron experiments were performed under the approval of the Photon Factory Program Advisory Committee (No. 2014G-129 and No. 2016G-159).
NDC
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
The Physical Society of Japan
一般社団法人日本物理学会
Date of Issued 2017-08-30
Rights
Copyright (c) 2017 一般社団法人日本物理学会
Copyright (c) 2017 The Physical Society of Japan
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
Publish Type Author’s Original
Access Rights open access
Source Identifier
[ISSN] 0031-9015
[NCID] AA00704814
[DOI] 10.7566/JPSJ.86.094709
[DOI] https://doi.org/10.7566/JPSJ.86.094709