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arXiv · 2503.08469

XY-like Incommensurate Magnetic Order in Ce$_2$SnS$_5$

Maximilien F. Debbas·Takehito Suzuki·Danielle R. Yahne·Joseph G. Checkelsky
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Abstract

We report the synthesis of single crystals of Ce$_2$SnS$_5$ through a two-stage chemical vapor transport method. The Ce$_2$SnS$_5$ system is a member of the orthorhombic $Pbam$ (No. 55) space group and realizes a distorted trigonal tricapped prism (TTP) crystal field around each cerium site. We characterized the sample through orientation-dependent magnetization and heat capacity measurements to probe the magnetic anisotropy in the system characteristic of XY-like anisotropic Heisenberg model behavior. Ce$_2$SnS$_5$ furthermore enters a zero-field ordered phase under $T_N =$ 2.4 K; powder neutron diffraction measurements reveal incommensurate magnetic order near $T_N$. The system then locks into a commensurate, two-$q$ magnetic structure below approximately 1.2 K. This commensurate structure belongs to the Shubnikov group $Pb'a'm'$ (MSG 55.359) and realizes the propagation vectors $\vec{q} = (1/3,0,0)$ and $\vec{q} = (0,0,0)$.

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Maximilien F. Debbas, Takehito Suzuki, Danielle R. Yahne, Joseph G. Checkelsky. 2025-03-11. XY-like Incommensurate Magnetic Order in Ce$_2$SnS$_5$. https://doi.org/10.1103/xv8k-812w

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