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.

5 pages, 6 figures

References in corpus (6)

• Spin current and magneto-electric effect in non-collinear magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites
• Collinear-to-Spiral Spin Transformation without Changing Modulation Wavelength upon Ferroelectric Transition in Tb1-xDyxMnO3
• Origin of electromagnon excitations in \textit{R}MnO${}_3$
• Origin of the multiferroic spiral spin-order in the RMnO3 perovskites

Cited by in corpus (1)

• Modeling and Physics of Multiferroic Perovskite Manganites