Phase Diagram and Incommensurate Phases in Undoped Manganites

Abstract

We study the existence of incommensurate phases in the phase diagram of the two orbital double exchange model coupled with Jahn-Teller phonons and with superexchange interactions. In agreement with experimental results, we find that undoped manganites $RMn{O}_3$ ($R$ being some rare earth element) show temperature induced commensurate-incommensurate phase transitions. In the incommensurate phase the magnetic wave vector varies with temperature. The incommensurate phase arises from the competition between the short range antiferromagnetic superexchange interaction and the long range ferromagnetic double exchange interaction.

References in corpus (5)

• Coexisting charge modulation and ferromagnetism produces long period phases in manganites: new example of electronic soft matter
• Neutron diffraction study of TbMnO3: Magnetic structure revisited
• Weak charge-lattice coupling requires reinterpretation of stripes of charge order in La1-xCaxMnO3
• Solitonic Phase in Manganites
• Phase Diagram of Half Doped Manganites

Cited by in corpus (7)

• Orbital ordering phenomena in $d$- and $f$-electron systems
• Electronic Phase Separation in Manganite/Insulator Interfaces
• Doping dependence of spin and orbital correlations in layered manganites
• Conducting Jahn-Teller Domain Walls in Undoped Manganites
• Jahn-Teller distortions and the magnetic order in the perovskite manganites
• Effects of rare earth ion size on the stability of the coherent Jahn-Teller distortions in undoped perovskite manganites
• Kinetics of orbital ordering in cooperative Jahn-Teller models: Machine-learning enabled large-scale simulations