Crucial role of magnetic dipole and anomalous field dependence in NiPS3
Abstract
NiPS3 has attracted considerable attention, yet the origin of its intriguing magnetic behaviors remains elusive due to limited insight into its low-energy anisotropy. Here, high-field torque magnetometry measurements are performed, revealing a previously unrecognized anisotropic spin response that reflects interaction terms beyond the standard XY or XXZ models. In combination with relativistic density functional theory calculations and magnetic force response theory, an effective low-energy spin Hamiltonian is constructed, elucidating not only the observed anomalous magnetic behavior but also other recent experiments. Remarkably, the magnetic dipole interaction and the associated spin-flop transition play a crucial role in driving the deviation from two-dimensional spin alignment, providing direct insight into the underlying anisotropic energy hierarchy. The generalized Hamiltonian can serve as the important fundamental ground for future study, and our approach adopted here will hopefully be relevant to many other related material systems.
Versions
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BibTeX
@misc{kiem2026crucial,
title = {{Crucial role of magnetic dipole and anomalous field dependence in $\mathrmNiPS_3$}},
author = {Do Hoon Kiem and Muhammad Nauman and Joonyoung Choi and David Graf and Junghyun Kim and Heejun Yang and Je-Geun Park and Younjung Jo and Myung Joon Han},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.28209},
eprint = {2610.28209},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.28209},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Crucial role of magnetic dipole and anomalous field dependence in NiPS_3
AU - Do Hoon Kiem
AU - Muhammad Nauman
AU - Joonyoung Choi
AU - David Graf
AU - Junghyun Kim
AU - Heejun Yang
AU - Je-Geun Park
AU - Younjung Jo
AU - Myung Joon Han
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.28209
UR - https://arxiv.org/abs/2610.28209
AB - NiPS_3 has attracted considerable attention, yet the origin of its intriguing magnetic behaviors remains elusive due to limited insight into its low-energy anisotropy. Here, high-field torque magnetometry measurements are performed, revealing a previously unrecognized anisotropic spin response that reflects interaction terms beyond the standard XY or XXZ models. In combination with relativistic density functional theory calculations and magnetic force response theory, an effective low-energy spin Hamiltonian is constructed, elucidating not only the observed anomalous magnetic behavior but also other recent experiments. Remarkably, the magnetic dipole interaction and the associated spin-flop transition play a crucial role in driving the deviation from two-dimensional spin alignment, providing direct insight into the underlying anisotropic energy hierarchy. The generalized Hamiltonian can serve as the important fundamental ground for future study, and our approach adopted here will hopefully be relevant to many other related material systems.
ER -