Collinear order and chirality-reorientation transition in the Cairo pentagonal magnet Bi${}_4$Fe${}_5$O${}_{13}$F

Abstract

We show that interlayer spins play a dual role in the Cairo pentagonal magnet Bi${}_4$Fe${}_5$O${}_{13}$F, on one hand mediating the three-dimensional (3D) magnetic order and on the other driving spin-reorientation transitions both within and between the planes. The corresponding sequence of magnetic orders unraveled by neutron diffraction and Mössbauer spectroscopy features two orthogonal magnetic structures described by opposite local vector chiralities, and an intermediate, partly disordered phase with nearly collinear spins. A similar collinear phase has been predicted theoretically to be stabilized by quantum fluctuations, but Bi${}_4$Fe${}_5$O${}_{13}$F is very far from the relevant parameter regime. While the observed in-plane reorientation cannot be explained by any standard frustration mechanism, our ab initio band-structure calculations reveal strong single-ion anisotropy of the interlayer Fe${}^{3+}$ spins that turns out to be instrumental in controlling the local vector chirality and the associated interlayer order.

published version (incl. Supplemental Material)

References in corpus (11)

• Quantum Spin Liquids
• The ALPS project release 1.3: open source software for strongly correlated systems
• Substantial magneto-electric coupling near room temperature in Bi2Fe4O9
• beta-Cu2V2O7: a spin-1/2 honeycomb lattice system
• Electromagnons in multiferroic RMn2O5 compounds and their microscopic origin
• Observation of a multiferroic critical end point
• Frustration and Dzyaloshinsky-Moriya anisotropy in the kagome francisites Cu${}_3$Bi(SeO${}_3{)}_2$O${}_2$X
• Determination of the exchange anisotropy in perovskite antiferromagnets using powder inelastic neutron scattering
• Magnetization Process of the S=1/2 Heisenberg Antiferromagnet on the Cairo Pentagon Lattice
• Order Parameters and Phase Diagram of Multiferroic RMn${}_2$O${}_5$
• Maxwell electromagnetism as an emergent phenomenon in condensed matter

Cited by in corpus (7)

• Magnetic structure and excitation spectrum of the hyperhoneycomb Kitaev magnet $\beta$-Li${}_2$IrO${}_3$
• Dimer Physics in the Frustrated Cairo Pentagonal Antiferromagnet Bi2Fe4O9
• Unravelling the complex magnetic structure of multiferroic pyroxene NaFeGe2O6: A combined experimental and theoretical study
• Magnetization process of the S=1/2 Heisenberg antiferromagnet on the floret pentagonal lattice
• Short-range Spin Freezing State in the Double Trillium Lattice Spin-Liquid Candidate KSrFe${}_2$(PO${}_4$)${}_3$ Revealed via ${}^{31}$P NMR
• Experimental determination of the magnetic interactions of frustrated Cairo pentagon lattice materials
• Numerical Study of S=1/2 Heisenberg Antiferromagnet on the Floret Pentagonal Lattice