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Theory of magnetic phases of hexagonal rare earth manganites

I. Munawar·S. H. Curnoe
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Abstract

The magnetic phases of hexagonal perovskites RMnO_3 (R=Ho, Er, Tm, Yb, Sc, Y) are analysed using group theory and the Landau theory of phase transitions. The competition between various magnetic order parameters is discussed in the context of antiferromagnetic interactions. A phenomenological model based on four one-dimensional magnetic order parameters is developed and studied numerically. It is shown that coupling of the various order parameters leads to a complex magnetic field-temperature phase diagram and the results are compared to experiment.

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I. Munawar, S. H. Curnoe. 2006-08-03. Theory of magnetic phases of hexagonal rare earth manganites. https://doi.org/10.1088/0953-8984%2F18%2F42%2F004

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