Variation of the Magnetic Properties of Antimony with Electron Concentration

The principal magnetic susceptibilities of single crystals of pure Sb and solid solution alloys of Sb with Sn, Ge, Pb, and Te have been determined. It is found that as the percent of alloying metal increases the susceptibility perpendicular to the trigonal axis (${\kappa }_{\perp }$) changes but little and remains diamagnetic. On the other hand the susceptibility parallel to this axis (${\kappa }_{\parallel }$) decreases sharply in magnitude and, in the case of Sn and Ge, changes from diagmagnetic to paramagnetic beyond 1.17 atomic percent Sn and 1.25 atomic percent Ge. This result permits us to calculate the number of electrons which overlap into the second Brillouin zone in antimony as ${10}^{-2\mathrm{}}$ electron per atom. The bearing of these results on the current theory of metals is discussed.