On sulfides and pnictides

Bertaut, E. F.

doi:10.1351/pac198052010073

Cited by 6 publications

(3 citation statements)

References 24 publications

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“…The room-temperature structure of troilite is also antiferromagnetic, with individual moments parallel to the crystallographic c axis (Hirahara & Murakami, 1958;Andresen et al, 1960;Bertaut, 1980). Combining with H 1 (as identified in Section 2.6) gives P " 6 6 0 2c 0 as the most likely magnetic space group with properties set out in Table 10. 3.2.…”

Section: Fes Troilitementioning

confidence: 98%

Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe_1−xS)

Haines

Howard

Harrison

et al. 2019

Acta Crystallogr B Struct Sci Cryst Eng Mater

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A group‐theoretical framework to describe vacancy ordering and magnetism in the Fe1−xS system is developed. This framework is used to determine the sequence of crystal structures consistent with the observed magnetic structures of troilite (FeS), and to determine the crystallographic nature of the low‐temperature Besnus transition in Fe0.875S. It is concluded that the Besnus transition is a magnetically driven transition characterized by the rotation of the moments out of the crystallographic plane to which they are confined above the transition, accompanied by small atomic displacements that lower the symmetry from monoclinic to triclinic at low temperatures. Based on the phase diagram, magnetically driven phase transitions at low temperatures are predicted in all the commensurate superstructures of pyrrhotite. Based on the phase diagram, magnetically driven spin reorientations at low temperatures are predicted in all the commensurate superstructures of pyrrhotite. The exact nature of the spin rotation is determined by the symmetry of the vacancy‐ordered state and based on this spin‐flop transitions in 3C and 5C pyrrhotite and a continuous rotation akin to that seen in 4C pyrrhotite are predicted. A Besnus‐type transition is also possible in 6C pyrrhotite. Furthermore, it is clarified that 3C and 4C pyrrhotite carry a ferrimagnetic moment whereas 5C and 6C are antiferromagnetic.

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Section: Fes Troilitementioning

confidence: 98%

Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe_1−xS)

Haines

Howard

Harrison

et al. 2019

Acta Crystallogr B Struct Sci Cryst Eng Mater

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show abstract

“…Below T N ∼ 588 K, FeS undergoes an antiferromagnetic (AFM) phase transition with spins perpendicular to the hexagonal axis (caxis) and around T s ∼445 K a spin-flip transition occurs where the spins align toward the c-axis [10]. At T α = 415 K a structural phase transition arises changing the crystal structure from the P 6 3 /mmc space group to the so-called troilite structure with space group P 62 c [11,12]. Interestingly, the opening of an energy band gap accompanies this structural phase change such as FeS also experiences a metal-insulator transition at T α .…”

mentioning

confidence: 99%

Unveiling the Room-Temperature Magnetoelectricity of Troilite FeS

Ricci

Bousquet

2016

Phys. Rev. Lett.

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We report on a first-principles study of the troilite phase of iron sulfide (FeS). We show that even if, a few decades ago, this material was thought to be ferroelectric, the structural transition from the high P6_{3}/mmc to the low P6[over ¯]2c symmetry phase does not involve polar instabilities, though the space inversion center symmetry is broken. Our calculations and symmetry analysis nevertheless reveal that FeS is magnetoelectric at room temperature with a response larger than the prototypical room-temperature magnetoelectric crystal Cr_{2}O_{3}. We also show that the spin channel decomposition of the polarization exhibits nonzero values in the opposite direction in FeS, which is actually a general hint of the presence of a magnetoelectric monopole in diagonal magnetoelectrics.

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“…2 n'est conjugu6 d'un autre sous-groupe de la Fig. 2.de diffraction de rayons X tr6s pr6cis queBertaut (1956Bertaut ( , 1979 a pu ~liminer deux des possibilit6s et attribuer sfirement ~, FeS la structure d&riv~e relevant du sous-groupe P62c (A B, A + 2B, 2C; 213~ [Voir…”

unclassified

Des dangers d'utiliser sans précaution des tables de sous-groupes maximum; retour au théorème d'Hermann

Billiet¹

1981

Acta Cryst Sect A

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On sulfides and pnictides

Cited by 6 publications

References 24 publications

Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe_1−xS)

Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe_1−xS)

Unveiling the Room-Temperature Magnetoelectricity of Troilite FeS

Des dangers d'utiliser sans précaution des tables de sous-groupes maximum; retour au théorème d'Hermann

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On sulfides and pnictides

Cited by 6 publications

References 24 publications

Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe1−xS)

Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe1−xS)

Unveiling the Room-Temperature Magnetoelectricity of Troilite FeS

Des dangers d'utiliser sans précaution des tables de sous-groupes maximum; retour au théorème d'Hermann

Contact Info

Product

Resources

About

Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe_1−xS)

Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe_1−xS)