BaFe${}_2$Se${}_3$: a high $T_{\mathrm{C}}$ magnetic multiferroic with large ferrielectric polarization

Abstract

The iron-selenides are important because of their superconducting properties. Here, an unexpected phenomenon is predicted to occur in an iron-selenide compound with a quasi-one-dimensional ladder geometry: BaFe${}_2$Se${}_3$ should be a magnetic ferrielectric system, driven by its magnetic block order via exchange striction. A robust performance (high $T_{\mathrm{C}}$ and large polarization) is expected. Different from most multiferroics, BaFe${}_2$Se${}_3$ is ferrielectric, with a polarization that mostly cancels between ladders. However, its strong magnetostriction still produces a net polarization that is large ($\sim$$0.1$ $\mu$C/cm${}^2$) as compared with most magnetic multiferroics. Its fully ferroelectric state, with energy only slightly higher than the ferrielectric, has a giant improper polarization $\sim$$2-3$ $\mu$C/cm${}^2$.

5 pages, 3 figures

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Cited by in corpus (10)

• Sequential structural and antiferromagnetic transitions in BaFe${}_2$Se${}_3$ under pressure
• Charge transfer and hybrid ferroelectricity in (YFeO${}_3$)${}_n$/(YTiO${}_3$)${}_n$ magnetic superlattices
• Spin waves and magnetic exchange interactions in the spin ladder compound RbFe${}_2$Se${}_3$
• Non-local correlations in the orbital selective Mott phase of a one dimensional multi-orbital Hubbard model
• Pairing Tendencies in a Two-orbital Hubbard Model in One Dimension
• Coexistence of localized and itinerant electrons in BaFe2X3 (X = S and Se) revealed by photoemission spectroscopy
• Polar State induced by Block-type Lattice Distortions in BaFe2Se3 with Quasi-One-Dimensional Ladder Structure
• Exchange striction driven magnetodielectric effect and potential photovoltaic effect in polar CaOFeS
• Block antiferromagnetism and possible ferroelectricity in KFe${}_2$Se${}_2$
• Magnetism of BaFe2Se3 studied by Mössbauer spectroscopy