Helicoidal ordering in iron perovskites

Abstract

We consider magnetic ordering in materials with negative charge transfer energy, such as iron perovskite oxides. We show that for a large weight of oxygen holes in conduction bands, the double exchange mechanism favors a helicoidal rather than ferromagnetic spin ordering both in metals, e.g. SrFeO_3 and insulators with a small gap, e.g. CaFeO_3. We discuss the magnetic excitation spectrum and effects of pressure on magnetic ordering in these materials.

4 pages, 5 figures

References in corpus (4)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Magnetism, Charge Order and Giant Magnetoresistance in SrFeO${}_{3-\delta }$ Single Crystals
• Orbital ordering in frustrated Jahn-Teller systems
• Orbital ordering in charge transfer insulators

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• Versatile helimagnetic phases under magnetic fields in cubic perovskite SrFeO3
• Edge states and skyrmion dynamics in nanostripes of frustrated magnets
• Emergent topological spin structures in a centrosymmetric cubic perovskite
• X-ray spectroscopic study of BaFeO${}_3$ thin films; an Fe${}^{4+}$ ferromagnetic insulator
• First Principles Calculation of Helical Spin Order in Iron Perovskite SrFeO3 and BaFeO3
• Competing exchange interactions on the verge of a metal-insulator transition in the two-dimensional spiral magnet Sr${}_3$Fe${}_2$O${}_7$
• Pressure Induced Ferromagnetism in Cubic Perovskite SrFeO3 and BaFeO3
• Incommensurate spiral order from double exchange interactions
• High-pressure synthesis of an unusual antiferromagnetic metal CaCoO${}_3$ with GdFeO${}_3$-type perovskite structure
• Octahedral Engineering of Orbital Polarizations in Charge Transfer Oxides
• Relationship between ferroelectricity and Dzyaloshinskii-Moriya interaction in multiferroics and the effect of bond-bending
• Widely-sweeping magnetic field-temperature phase diagrams for skyrmion-hosting centrosymmetric tetragonal magnets
• Double-$Q$ Chiral Stripe in the $d$-$p$ Model with Strong Spin-Charge Coupling
• Itinerancy-dependent non-collinear spin textures in SrFeO3, CaFeO3, and CaFeO3/SrFeO3 heterostructures probed via resonant x-ray scattering
• Impact of oxygen doping and oxidation state of iron on the electronic and magnetic properties of BaFeO$_{3-δ}
• Double-exchange model study of multiferroic $R$MnO${}_3$ perovskites
• Magnetic Hedgehog Lattice in a Centrosymmetric Cubic Metal
• Real-Space Observation of Ligand Hole State in Cubic Perovskite SrFeO${}_3$
• Emergent c-axis magnetic helix in manganite-nickelate superlattices
• Effective action of the weakly doped t-J model and spin-wave excitations in the spin-glass phase of La_{2-x}Sr_xCuO_4
• Reentrant multiple-$\mathbf{q}$ magnetic order and a "spin-cholesteric" phase in Sr${}_3$Fe${}_2$O${}_7$
• Floating Zone Growth of Large Single Crystals of SrFeO_3-x
• Electrically-excited Motion of Topological Defects in Multiferroic Materials
• Flexomagnetoelectric Interaction in Cubic, Tetragonal and Orthorhombic Crystals
• Possible helimagnetic order in Co4+-containing perovskites Sr1-xCaxCoO3
• Exploration of metastable A-site-ordered perovskites (Ca,Ba)FeO3-δ by computationally-guided multi-step synthesis
• Anomalous quasielastic scattering contribution in the centrosymmetric multi-$\mathbf{q}$ helimagnet SrFeO${}_3$