Spin-reorientation transitions in the Cairo pentagonal magnet Bi4 Fe5 O13 F

Alexander A. Tsirlin, Ioannis Rousochatzakis, Dmitry Filimonov, Dmitry Batuk, Matthias Frontzek, Artem M. Abakumov

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We show that interlayer spins play a dual role in the Cairo pentagonal magnet Bi4Fe5O13F, on one hand mediating the three-dimensional 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 Bi4Fe5O13F 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 Fe3+ spins that turns out to be instrumental in controlling the local vector chirality and the associated interlayer order.

Original languageEnglish
Article number094420
JournalPhysical Review B
Volume96
Issue number9
DOIs
Publication statusPublished - 19 Sep 2017

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