| Issue |
Europhys. Lett.
Volume 59, Number 2, July 2002
|
|
|---|---|---|
| Page(s) | 277 - 283 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00238-x | |
| Published online | 01 July 2002 | |
Ferromagnetic transition in a double-exchange system containing impurities in the Dynamical Mean-Field Approximation
1
Department of Electrical and Computer Engineering
Ben-Gurion University of the Negev - P.O. Box 653,
Beer-Sheva, 84105 Israel
2
Jack and Pearl Resnick Institute of Advanced
Technology Department of Physics, Bar-Ilan University
- Ramat-Gan 52900, Israel
Received:
4
December
2001
Accepted:
24
April
2002
We formulate the Dynamical Mean-Field Approximation equations for the double-exchange system with quenched disorder for arbitrary relation between Hund exchange coupling and electron bandwidth. Close to the ferromagnetic-paramagnetic transition point the DMFA equations can be reduced to the ordinary mean-field equation of Curie-Weiss type. We solve the equation to find the transition temperature and present the magnetic phase diagram of the system.
PACS: 75.10.Hk – Classical spin models / 75.30.Mb – Valence fluctuation, Kondo lattice, and heavy-fermion phenomena / 75.30.Vn – Colossal magnetoresistance
© EDP Sciences, 2002
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.