Magnetic order in 2D antiferromagnets revealed by spontaneous anisotropic magnetostriction

Maurits J. A. Houmes (), Gabriele Baglioni, Makars Šiškins, Martin Lee, Dorye L. Esteras, Alberto M. Ruiz, Samuel Mañas-Valero, Carla Boix-Constant, Jose J. Baldoví, Eugenio Coronado, Yaroslav M. Blanter, Peter G. Steeneken and Herre S. J. Zant
Additional contact information
Maurits J. A. Houmes: Delft University of Technology
Gabriele Baglioni: Delft University of Technology
Makars Šiškins: Delft University of Technology
Martin Lee: Delft University of Technology
Dorye L. Esteras: Universitat de València
Alberto M. Ruiz: Universitat de València
Samuel Mañas-Valero: Delft University of Technology
Carla Boix-Constant: Universitat de València
Jose J. Baldoví: Universitat de València
Eugenio Coronado: Universitat de València
Yaroslav M. Blanter: Delft University of Technology
Peter G. Steeneken: Delft University of Technology
Herre S. J. Zant: Delft University of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: 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 MPS3 (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-induced anisotropic 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.

Date: 2023
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DOI: 10.1038/s41467-023-44180-4

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