Neel Temperature for Quasi-Two-Dimensional Dipolar Antiferromagnets

Details Neel Temperature for Quasi-Two-Dimensional Dipolar Antiferromagnets Neel Temperature for Quasi-Two-Dimensional Dipolar Antiferromagnets

1993-10-21

arxiv.org/abs/cond-mat/9310049v1

Physics

Condensed Matter

12 pages, REVTEX, TUM-CP-93-02

Scientific paper

10.1103/PhysRevB.49.413

We calculate the N\'eel temperature $T_N$ for two-dimensional isotropic
dipolar Heisenberg antiferromagnets via linear spin-wave theory and a high
temperature expansion, employing the method of Callen. The theoretical
predictions for $T_N$ for K$_2$MnF$_4$, Rb$_2$MnF$_4$, Rb$_2$MnCl$_4$ and
(CH$_3$NH$_3$)$_2$MnCl$_4$ are in good agreement with the measured values.

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