A. Hjelm et al., FIELD-INDUCED MAGNETISM IN ITINERANT F-ELECTRON SYSTEMS - U, PU, AND CE, Physical review. B, Condensed matter, 50(7), 1994, pp. 4332-4340
We demonstrate, by means of first-principles calculations, that in the
field-induced magnetic state of alpha-cerium and alpha-uranium the sp
in and orbital moments are coupled parallel rather than antiparallel a
s expected from Hund's third rule. This behavior gives a magnetic form
factor for alpha-uranium in very good agreement with experiment. The
calculated form factor of alpha-cerium, when assuming that the f elect
ron is itinerant, is very different from the localized Ce3+ form facto
r, and we propose that a measurement of the magnetic form factor of al
pha-Ce can indicate whether the f state is localized or itinerant. The
held-induced magnetism of plutonium is shown to be almost exclusively
of orbital character and the induced spin density of plutonium is hig
hly anomalous.