Using the Kondo lattice model with classical spins in infinite dimension, magnetic phase transition in the perovskite-type 3d transition-metal oxide (La,Sr)MnO3 is theoretically studied. On the Bethe lattice, the self-consistency equations are solved exactly. Curie temperatures at the region of double-exchange ferromagnetism 0.1<x<0.25 as well as the Neel temperature at x=0 are well reproduced quantitatively. Pressure effect on the Curie temperature is also discussed.
@article{arxiv.cond-mat/9505009,
title = {Magnetic Transition Temperature of (La,Sr)MnO$_3$},
author = {Nobuo Furukawa},
journal= {arXiv preprint arXiv:cond-mat/9505009},
year = {2016}
}
Comments
7 pages, 1 PS file with 3 figures appended at the end, LaTeX