Magnetic order in 2D antiferromagnets revealed by spontaneous anisotropic magnetostriction
Abstract
The temperature dependent order parameter provides important information on the nature of magnetism. Using traditional methods to study this parameter in two-dimensional (2D) magnets remains difficult, however, particularly for insulating antiferromagnetic (AF) compounds. Here, we show that its temperature dependence in AF MPS (M(II) = Fe, Co, Ni) can be probed via the anisotropy in the resonance frequency of rectangular membranes, mediated by a combination of anisotropic magnetostriction and spontaneous staggered magnetization. Density functional calculations followed by a derived orbital-resolved magnetic exchange analysis confirm and unravel the microscopic origin of this magnetization inducing anistropic strain. We further show that the temperature and thickness dependent order parameter allows to deduce the material's critical exponents characterising magnetic order. Nanomechanical sensing of magnetic order thus provides a future platform to investigate 2D magnetism down to the single-layer limit.
Keywords
Cite
@article{arxiv.2303.11234,
title = {Magnetic order in 2D antiferromagnets revealed by spontaneous anisotropic magnetostriction},
author = {Maurits J. A. Houmes and Gabriele Baglioni and Makars Šiškins and Martin Lee and Dorye L. Esteras and Alberto M. Ruiz and Samuel Mañas-Valero and Carla Boix-Constant and Jose J. Baldoví and Eugenio Coronado and Yaroslav M. Blanter and Peter G. Steeneken and Herre S. J. van der Zant},
journal= {arXiv preprint arXiv:2303.11234},
year = {2023}
}
Comments
9 pages, 4 figures, 1 table. Appended SI