Theory of magnetic phases of hexagonal rare earth manganites

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.

arXiv comment11 pages, 14 figures. Manuscript with higher quality figures can be obtained here: http://www.physics.mun.ca/~curnoe/papers/RMnO3.submit.pdf

References in corpus (6)

• A Field-Induced Re-Entrant Novel Phase and A Ferroelectric-Magnetic Order Coupling in HoMnO3
• Magnetic Order and Spin Dynamics in Ferroelectric HoMnO${}_3$
• Strong spin-lattice coupling in multiferroic HoMnO${}_3$: Thermal expansion anomalies and pressure effect
• Novel Field-Induced Phases in HoMnO3 at Low Temperatures
• Low temperature dielectric anomalies in HoMnO_3: The complex phase diagram
• Magnetic Phases of Rare Earth Hexagonal Manganites

Cited by in corpus (8)

• Dominance of magnetoelastic coupling in multiferroic hexagonal YMnO_3
• Mutual induction of magnetic 3d and 4f order in multiferroic hexagonal ErMnO3
• Incompatible Magnetic Order in Multiferroic Hexagonal DyMnO3
• Magnons and crystal field transitions in hexagonal REMnO3 (RE = Er, Tm, Yb, Lu) single crystals
• A model of magnetic order in hexagonal HoMnO3
• Magnetic Order of the Hexagonal Rare Earth Manganite Dy(0.5)Y(0.5)MnO3
• Giant Magnetic Fluctuations at the Critical Endpoint in Insulating HoMnO3
• Single-crystal neutron diffraction study of hexagonal YbMnO${}_3$ multiferroic under magnetic field