Antiferromagnets exhibit magnetic order but zero total magnetic moment due to spin compensation. One classical antiferromagnet is rock-salt MnSe, which we have grown for the first time on a sapphire substrate,

"MnSe - Molecular Beam Epitaxy Growth and Optical Characterisation", J. Kucharek, R. Bożek, W. Pacuski, Acta Physica Polonica A 136, 598 (2019).

Altermagnets also exhibit zero magnetization, but due to their low symmetry, they exhibit spin-split bands. In some aspects, they are quite similar to ferromagnets and can potentially exhibit similar phenomena, such as spin-polarized currents. We have discovered and grown a new altermagnet: wurtzite MnSe,

"Wurtzite vs rock-salt MnSe epitaxy: electronic and altermagnetic properties", M. J. Grzybowski, C. Autieri, J. Domagała, C. Krasucki, A. Kaleta, S. Kret, K. Gas, M. Sawicki, R. Bożek, J. Suffczyński, W. Pacuski, Nanoscale 16, 6259 (2024).

More such structures will be grown and studied by dr. Michał Grzybowski