Magnetic Transition Temperature of (La,Sr)MnO${}_3$

Abstract

Using the Kondo lattice model with classical spins in infinite dimension, magnetic phase transition in the perovskite-type $3d$ transition-metal oxide (La,Sr)MnO${}_3$ 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.

7 pages, 1 PS file with 3 figures appended at the end, LaTeX

References in corpus (2)

• Double Exchange Alone Does Not Explain the Resistivity of $L{a}_{1-x}S{r}_{x}Mn{O}_3$
• Transport Properties of the Kondo Lattice Model in the Limit $S=\infty$ and $D=\infty$

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