The piezomagnetic effect refers to a linear coupling between mechanical deformation and magnetization. Initially pointed out by Dzyloshinskii in 1950s from a symmetry point of view [1], piezomagnetic coupling is permitted in systems with broken time reversal symmetry and often accompanies a combined time reversal-rotation symmetry. In the context of emerging complex orders in quantum materials, piezomagnetic coupling can offer powerful insights into the underlying symmetries of a given system and the intricate interplay among mechanical, magnetic, and electronic degrees of freedom. In this talk, I will first demonstrate how this effect can be applied to probe the susceptibility of an otherwise elusive magnetic octupole order [2]. I will then show our recent applications of this effect to manipulate the domains of topological antiferromagnets. From the experimental perspective, we will introduce a new technique termed the elastocaloric effect [3] as a thermodynamic tool well suited for probing the piezomagnetic effect in broad classes of quantum materials.
[1] Dzialoshinskii, Soviet JETP, 6, 621 (1958)
[2] Ye, Sorensen et al., Nat. Commun. 15, 7005 (2024)
[3] Ikeda et al., Rev. Sci. Instrum. 90, 083902 (2019)
