Magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO6

Brady Wilson; Ananta Raj Acharya; Eun Sang Choi; Ram Rai; Qiang Zhang; Stuart Calder; Rafael Gonzalez-Hernandez; Jonathan Guerrero Sanchez; Chetan Dhital

doi:10.1016/j.jmmm.2025.172963

Magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO₆

Brady Wilson, Ananta Raj Acharya, Eun Sang Choi, Ram Rai, Qiang Zhang, Stuart Calder, Rafael Gonzalez-Hernandez, Jonathan Guerrero Sanchez, Chetan Dhital

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Abstract

We investigate the magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO₆ (CTMO) through neutron diffraction, magnetization, and magnetodielectric measurements, complemented by density functional theory (DFT) calculations. Our findings reveal a canted magnetic structure with moments confined to the ab plane, giving rise to weak ferromagnetism under an external magnetic field. Additionally, we observe magnetodielectric coupling that strongly correlates with the magnetic ordering temperature and magnetic structure. These results are discussed in the context of potential mechanisms involving spin-dependent p-d hybridization and spin-phonon coupling.

Original language	English
Article number	172963
Journal	Journal of Magnetism and Magnetic Materials
Volume	622
DOIs	https://doi.org/10.1016/j.jmmm.2025.172963
State	Published - Jun 15 2025

Funding

This work was supported by the National Science Foundation under Grant No. NSF DMR-2213443. A portion of this research was conducted at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation through Cooperative Agreement No. DMR-2128556 and the State of Florida. Neutron scattering experiments were carried out at the High Flux Isotope Reactor and Spallation Neutron Source, DOE Office of Science User Facilities operated by Oak Ridge National Laboratory. Beam time was allocated on HB2A under proposal number IPTS-30318.1 and on POWGEN under proposal number IPTS-33738.1. We acknowledge partial financial support from DGAPA-UNAM through project IG101124. Computational work was performed at the DGCTIC-UNAM Supercomputing Center under project LANCAD-UNAM-DGTIC-368. This work was supported by the National Science Foundation under Grant No. NSF DMR-2213443 . A portion of this research was conducted at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation through Cooperative Agreement No. DMR-2128556 and the State of Florida. Additional resources were utilized at the High Flux Isotope Reactor and the Spallation Neutron Source, both of which are U.S. Department of Energy (DOE) Office of Science User Facilities operated by Oak Ridge National Laboratory.

Keywords

Canted magnetism
Chiral magnet
Magnetic structure
Magnetodielectric coupling
Spin-phonon coupling

Access to Document

10.1016/j.jmmm.2025.172963

Cite this

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title = "Magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO6",

abstract = "We investigate the magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO6 (CTMO) through neutron diffraction, magnetization, and magnetodielectric measurements, complemented by density functional theory (DFT) calculations. Our findings reveal a canted magnetic structure with moments confined to the ab plane, giving rise to weak ferromagnetism under an external magnetic field. Additionally, we observe magnetodielectric coupling that strongly correlates with the magnetic ordering temperature and magnetic structure. These results are discussed in the context of potential mechanisms involving spin-dependent p-d hybridization and spin-phonon coupling.",

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AU - Wilson, Brady

AU - Acharya, Ananta Raj

AU - Choi, Eun Sang

AU - Rai, Ram

AU - Zhang, Qiang

AU - Calder, Stuart

AU - Gonzalez-Hernandez, Rafael

AU - Sanchez, Jonathan Guerrero

AU - Dhital, Chetan

PY - 2025/6/15

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N2 - We investigate the magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO6 (CTMO) through neutron diffraction, magnetization, and magnetodielectric measurements, complemented by density functional theory (DFT) calculations. Our findings reveal a canted magnetic structure with moments confined to the ab plane, giving rise to weak ferromagnetism under an external magnetic field. Additionally, we observe magnetodielectric coupling that strongly correlates with the magnetic ordering temperature and magnetic structure. These results are discussed in the context of potential mechanisms involving spin-dependent p-d hybridization and spin-phonon coupling.

AB - We investigate the magnetic structure and magnetodielectric behavior of the chiral magnet CoTeMoO6 (CTMO) through neutron diffraction, magnetization, and magnetodielectric measurements, complemented by density functional theory (DFT) calculations. Our findings reveal a canted magnetic structure with moments confined to the ab plane, giving rise to weak ferromagnetism under an external magnetic field. Additionally, we observe magnetodielectric coupling that strongly correlates with the magnetic ordering temperature and magnetic structure. These results are discussed in the context of potential mechanisms involving spin-dependent p-d hybridization and spin-phonon coupling.

KW - Canted magnetism

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KW - Magnetic structure

KW - Magnetodielectric coupling

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