Document Type


Publication Date



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