Roles of Bond Alternation in Magnetic Phase Diagram of RMnO3

Abstract

In order to investigate nature of the antiferromagnetic structures in perovskite RMnO3, we study a Heisenberg J1-J2 model with bond alternation using analytical and numerical approaches. The magnetic phase diagram which includes incommensurate spiral states and commensurate collinear states is reproduced. We discuss that the magnetic structure with up-up-down-down spin configuration (E-type structure) and the ferroelectricity emerge cooperatively to stabilize this phase. Magnetoelastic couplings are crucial to understand the magnetic and electric phase diagram of RMnO3.

arXiv comment5 pages, 6 figures

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Cited by in corpus (4)

• Perovskite Manganites Hosting Versatile Multiferroic Phases with Symmetric and Antisymmetric Exchange Strictions
• Theory of spin-phonon coupling in multiferroic Mn perovskites
• Single-axis dependent structural and multiferroic properties of orthorhombic RMnO${}_3$ (R = Gd - Lu)
• Modeling and Physics of Multiferroic Perovskite Manganites