| Issue |
EPL
Volume 79, Number 5, September 2007
|
|
|---|---|---|
| Article Number | 57006 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/79/57006 | |
| Published online | 01 August 2007 | |
Coexistence of ferromagnetism and Kondo effect in the underscreened Kondo lattice
1
Institute fur Theoretische Physik, TU Braunschweig - Mendelssohnstrasse 3, 38106 Braunschweig, Germany
2
Bogoliubov Laboratory of Theoretical Physics, JINR - Dubna, Russia
3
Instituto de Física, Universidade Federal do Rio Grande do Sul - 91501-970 Porto Alegre, Brazil
4
Laboratoire de Physique des Solides, UMR 8502 CNRS, Université Paris-Sud - 91405 Orsay, France
Received:
26
January
2007
Accepted:
10
July
2007
The coexistence of ferromagnetic order and Kondo behavior, that has been experimentally observed in some uranium compounds, is studied in the framework of an underscreened Kondo lattice model within the mean-field approach. For small values of JK compared to the bandwidth, a ferromagnetically ordered solution is obtained, while for larger values of JK a Kondo regime occurs with a Kondo temperature larger than the Curie temperature, suggesting a scenario for the coexistence of Kondo effect and ferromagnetic order.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.30.Mb – Valence fluctuation, Kondo lattice, and heavy-fermion phenomena / 75.20.Hr – Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions
© Europhysics Letters Association, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.