J. Phys. Soc. Jpn. 90, 114702 (2021) [5 Pages]
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Oval-cycloidal Magnetic Structure with Phase-shift in the Non-centrosymmetric Tetragonal Compound CePdSi3

Daichi Ueta1,2, , Masahiro Yoshida2, Tomohiro Kobuke2, Yoichi Ikeda3, Akiko Nakao4, Taketo Moyoshi4, Koji Munakata4, Yaohua Liu5,6 , Takatsugu Masuda2,1, and Hideki Yoshizawa2
+ Affiliations
1Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan2Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan3Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan4Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki 319-1106, Japan5Neutron Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, U.S.A.6Second Target Station, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, U.S.A.
Received July 5, 2021; Accepted September 14, 2021; Published October 15, 2021

CePdSi3 with H // [100] exhibits multiple metamagnetic transitions. Since there is no frustration in this system, it is suggested that the origin of the multiple metamagnetic transitions is the influence of the antisymmetric spin–orbit interaction. To clarify the magnetic structure under the influence of the antisymmetric spin–orbit interaction, neutron diffraction experiments have been performed using single crystal samples of CePdSi3. There are observed magnetic reflections with incommensurate magnetic propagation vector \(q = (0.315,0,0)\) in the phase I. In addition, additional magnetic reflections were also observed in the phase III. The magnetic structure was found to be an oval-cycloidal structure at the phase III in CePdSi3, and we discuss the origin of the unusual magnetic structure.

©2021 The Physical Society of Japan
https://doi.org/10.7566/JPSJ.90.114702

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