Field-induced magnetism in itinerant [ital f]-electron systems: U, Pu, and Ce
- Department of Technology, Uppsala University, Box 534, S-751 21 Uppsala (Sweden)
- Condensed Matter Theory Group, Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala (Sweden)
- Theoretical Division, Los Alamos National Laboratory, New Mexico 87545 (United States)
We demonstrate, by means of first-principles calculations, that in the field-induced magnetic state of [alpha]-cerium and [alpha]-uranium the spin and orbital moments are coupled parallel rather than antiparallel as 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 [ital f] electron is itinerant, is very different from the localized Ce[sup 3+] form factor, and we propose that a measurement of the magnetic form factor of [alpha]-Ce can indicate whether the [ital f] state is localized or itinerant. The field-induced magnetism of plutonium is shown to be almost exclusively of orbital character and the induced spin density of plutonium is highly anomalous.
- OSTI ID:
- 7007008
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:7; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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