Magnetic Susceptibility of the DoubleExchange Model in the RKKY Limit
Abstract
The magnetic susceptibility and EdwardsAnderson order parameter q of the spinglasslike (SGL) phase of the doubleexchange model are evaluated in the weakcoupling or RKKY limit. Dynamical meanfield theory is used to show that q=M(T/Tsg)^2, where M is the classical Brillouin function and Tsg is the SGL transition temperature. The correlation length of the SGL phase is determined by a correlation parameter Q that maximizes Tsg and minimizes the free energy. The magnetic susceptibility has a cusp at Tsg and reaches a nonzero value as T goes to zero.
 Publication:

arXiv eprints
 Pub Date:
 June 2006
 arXiv:
 arXiv:condmat/0606699
 Bibcode:
 2006cond.mat..6699F
 Keywords:

 Condensed Matter  Strongly Correlated Electrons;
 Condensed Matter  Materials Science
 EPrint:
 8 pages, 2 figures