Structural and magnetic properties of TbCuAs2 studied by X-ray and neutron scattering
Abstract
We investigated antiferromagnetic metal TbCuAs2, which exhibits an anomalous resistivity upturn at low temperatures. This resistivity upturn has been proposed to originate from the material's magnetic ground state; however, the precise nature of the antiferromagnetic ordering in this compound has not been previously established. Here, we present a combined single crystal neutron diffraction, X-ray resonant magnetic scattering, and single crystal X-ray diffraction study of TbCuAs2. These measurements unambiguously determine the Tb magnetic moment direction, the antiferromagnetic arrangement along high symmetry directions, the interplay between structure and magnetism, and their temperature dependence. Our observations are compared with previous studies on sister compounds in the rare-earth copper arsenide family (RCuAs2, R = Sm and Gd), which also displays resistivity anomalies. We suggest a common underlying physics governing the structural and magentic properties of rare-earth copper arsenides that exhibit low-temperature resistivity anomalies.
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BibTeX
@misc{kim2026structural,
title = {{Structural and magnetic properties of TbCuAs$_2$ studied by X-ray and neutron scattering}},
author = {M. G. Kim and T. Heitmann and S. Boney and C. Neupane and R. Acevedo-Esteves and A. Sapkota and D. Evans and P. C. Canfield and C. Nelson and E. D. Mun and J. -W. Kim},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.22589},
eprint = {2609.22589},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.22589},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Structural and magnetic properties of TbCuAs_2 studied by X-ray and neutron scattering
AU - M. G. Kim
AU - T. Heitmann
AU - S. Boney
AU - C. Neupane
AU - R. Acevedo-Esteves
AU - A. Sapkota
AU - D. Evans
AU - P. C. Canfield
AU - C. Nelson
AU - E. D. Mun
AU - J. -W. Kim
PY - 2026
DA - 2026/09/18
PB - arXiv
DO - 10.48550/arxiv.2609.22589
UR - https://arxiv.org/abs/2609.22589
AB - We investigated antiferromagnetic metal TbCuAs_2, which exhibits an anomalous resistivity upturn at low temperatures. This resistivity upturn has been proposed to originate from the material's magnetic ground state; however, the precise nature of the antiferromagnetic ordering in this compound has not been previously established. Here, we present a combined single crystal neutron diffraction, X-ray resonant magnetic scattering, and single crystal X-ray diffraction study of TbCuAs_2. These measurements unambiguously determine the Tb magnetic moment direction, the antiferromagnetic arrangement along high symmetry directions, the interplay between structure and magnetism, and their temperature dependence. Our observations are compared with previous studies on sister compounds in the rare-earth copper arsenide family (RCuAs_2, R = Sm and Gd), which also displays resistivity anomalies. We suggest a common underlying physics governing the structural and magentic properties of rare-earth copper arsenides that exhibit low-temperature resistivity anomalies.
ER -