Recently it has been discovered that weak ferromagnetism of a dilute three-dimensional electron gas develops on the energy scale of the Fermi temperature in some of the hexaborides; that is, the Curie temperature approximately equals the Fermi temperature. We report the results of de Haas–van Alphen experiments on two concentrations of La-doped (formula presented) as well as Ca-deficient (formula presented) and Sr-deficient (formula presented) The results show that a Fermi surface exists in each case and that there are significant electron-electron interactions in the low-density electron gas. © 2001 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review B - Condensed Matter and Materials Physics
Hall, D., Young, D., Fisk, Z., Murphy, T., Palm, E., Teklu, A., & Goodrich, R. (2001). Fermi-surface measurements on the low-carrier density ferromagnet (formula presented) and (formula presented). Physical Review B - Condensed Matter and Materials Physics, 64 (23) https://doi.org/10.1103/PhysRevB.64.233105