Successive ferroelectric transitions induced by complex spin structures in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Mn</mml:mi><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Shanbhag, Pavitra N.; Orlandi, Fabio; Manuel, Pascal; Etter, Martin; Bhat, Shrikant; Sundaresan, A.

doi:10.1103/physrevb.109.024401

Phys. Rev. B

2024

DOI: 10.1103/physrevb.109.024401

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Successive ferroelectric transitions induced by complex spin structures in MnBi2S4

Pavitra N. Shanbhag,

Fabio Orlandi,

Pascal Manuel

et al.

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Antiferromagnetic Ordering in Quasi-One-Dimensional FeBi₄S₇

Campbell,

Garlea,

Zhang

et al. 2024

Chem. Mater.

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We report a detailed study of the synthesis, composition, magnetic structure, and transport properties of a quasi-one-dimensional antiferromagnet FeBi4S7 that contains chains of edge-sharing FeS6 octahedra. High-resolution powder X-ray diffraction (PXRD) analysis, aided by variation of synthetic conditions, suggests that the true formula of the material is Fe1.2Bi3.8S7, due to the minor substitution of Fe into Bi sites. This finding is in agreement with crystal structure refinement from neutron powder diffraction data as well as with the small band gap of 0.23 eV determined from electrical transport measurements. Analysis of the neutron diffraction pattern collected below the antiferromagnetic ordering temperature of 64 K revealed ferromagnetic coupling between the Fe moments in the chains of FeS6 octahedra. The overall ordering, however, is antiferromagnetic due to the antiparallel arrangement of moments on neighboring chains. The collinear spin arrangement is described by a k -vector (1, 0, 1/2), which indicates doubling of the unit cell in the c direction and the loss of the C-centering translation as compared to the nuclear cell. The ferromagnetic nature of the sulfide-bridged chains of Fe2+ ions in FeBi4S7, in contrast to the antiferromagnetic coupling between Fe moments in compounds with similar structural fragments, can be justified by the analysis of metric parameters that characterize the Fe–S bonding in these materials.

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Antiferromagnetic Ordering in Quasi-One-Dimensional FeBi₄S₇

Campbell,

Garlea,

Zhang

et al. 2024

Chem. Mater.

View full text Add to dashboard Cite

show abstract

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Successive ferroelectric transitions induced by complex spin structures in MnBi2S4

Cited by 1 publication

References 54 publications

Antiferromagnetic Ordering in Quasi-One-Dimensional FeBi₄S₇

Antiferromagnetic Ordering in Quasi-One-Dimensional FeBi₄S₇

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Successive ferroelectric transitions induced by complex spin structures in MnBi2S4

Cited by 1 publication

References 54 publications

Antiferromagnetic Ordering in Quasi-One-Dimensional FeBi4S7

Antiferromagnetic Ordering in Quasi-One-Dimensional FeBi4S7

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Antiferromagnetic Ordering in Quasi-One-Dimensional FeBi₄S₇

Antiferromagnetic Ordering in Quasi-One-Dimensional FeBi₄S₇