Fermi surface of GdMg, showing a clear nesting feature, which gives rise to the antiferromagnetic ordering of GdMg.

Complex Magnetism of Lanthanide Intermetallics and the Role of their Valence Electrons: Ab Initio Theory and Experiment

L. Petit, D. Paudyal, Y. Mudryk, K. A. Gschneidner, Jr., V. K. Pecharsky, M. Lüders, Z. Szotek, R. Banerjee, and J. B. Staunton
Phys. Rev. Lett. 115, 207201 – Published 9 November 2015