Vincent BALTZ : Altermagnetism

Résumé : Altermagnets are characterized by anisotropic and asymmetric spin densities across their magnetic sublattices (Figure) and are described by a multipolar order parameter, sharing conceptual similarities with frameworks developed for superconductors and multiferroics [1,2]. This anisotropy is rooted in crystal symmetry, whether intrinsic or engineered through growth, and gives rise to a range of distinctive physical properties. In particular, altermagnets combine the best of both worlds: the spin-polarized currents of ferromagnets with the ultrafast dynamics and zero net magnetization of antiferromagnets. As such, they offer promising opportunities for the next generation of spintronic devices. In this presentation, I will showcase this emerging class of materials, with particular emphasis on our workhorse light-element altermagnet Mn5Si3

Références:

[1] C Song et al, Altermagnets as a new class of functional materials, Nat. Rev. Mater. 10, 473 (2025)

[2] V. Baltz et L. Michez, Altermagnétisme : la face cachée du monde magnétique, Reflets Phys. 83, 25 (2026)

Biographie : Vincent Baltz is a CNRS researcher at SPINTEC. He aims to explore the unique spin transport properties of compensated magnets, including antiferromagnets and altermagnets, and their spin textures for spintronics.

Vincent BALTZ (SPINTEC, Univ. Grenoble Alpes / CNRS /CEA)