Magnetic structure of TlFeS2 and TlFeSe2 chalcogenides

Asgerov, E. B.; Dang, N. T.; Beskrovnyy, A. I.; Madadzada, A. I.; Ismayilov, D. I.; Mehdiyeva, R. N.; Jabarov, S. H.; Karimova, E. M.

doi:10.1134/s1063782615070039

Cited by 16 publications

(14 citation statements)

References 14 publications

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“…[13] All AFeX 2 compounds have tetrahedrally co-arXiv:1905.03318v1 [cond-mat.mtrl-sci] 8 May 2019 ordinated Fe 3+ chains along c, but many of these have an additional degree of structural freedom, manifested as a monoclinic distortion (TlFeS 2 , TlFeSe 2 , KFeSe 2 , and RbFeSe 2 with the magnetic moments ordered perpendicular to the chains; and KFeS 2 , RbFeS 2 with the ordered moments slightly tilted from the chain axis). [14,15] Only CsFeS 2 is orthorhombic, but it further distorts martensitically at its magnetic transition at 70 K, with moments slightly tilted off the chain direction. [16] Unlike the well-studied AFeX 2 -type compounds, the compounds in the A 2 M X 2 family have not been examined in sufficient detail to understand any of their magnetic ground states.…”

Section: Introductionmentioning

confidence: 99%

Incommensurate magnetism in K2MnS2−xSex and prospects for tunable frustration in a triangular lattice of pseudo-1D spin chains

Bhutani

Behera

McAuliffe

et al. 2019

Phys. Rev. Materials

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We report the first detailed investigation of K2MnS2 and K2MnSe2 from the K2MnS2 structure type and their magnetic solid solution K2MnS2−xSex and find that compounds of this structure type consist of strongly-coupled pseudo-one-dimensional antiferromagnetic chains that collectively represent a frustrated two-dimensional triangular antiferromagnet. Bulk samples of K2MnS2−xSex with 0 ≤ x ≤ 2 are characterized using X-ray diffraction, neutron diffraction, magnetization and heat capacity measurements. An incommensurate cycloid magnetic structure with a magnetic propagation vector k = [0.58 0 1] is observed for all samples in K2MnS2−xSex, and the ordering is robust despite a 12% increase in cell volume. Geometric frustration of chains results in incommensurability along a and a two-step magnetic transition. The varying geometries accessible in compounds of this structure type are presented as promising avenues to tune frustration.

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Section: Introductionmentioning

confidence: 99%

Incommensurate magnetism in K2MnS2−xSex and prospects for tunable frustration in a triangular lattice of pseudo-1D spin chains

Bhutani

Behera

McAuliffe

et al. 2019

Phys. Rev. Materials

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“…Motivated by this theoretical study, we are interested in the ternary 𝐴FeSe 2 and related compounds. A literature survey shown that the layered tetragonal structure used in the above theoretical study [10] is thermodynamically unstable for these 𝐴FeSe 2 compounds, which actually crystallize in the quasi-onedimensional (Q1D) monoclinic structures with space group 𝐶2/𝑐 for 𝐴 = K and Rb [11] and 𝐶2/𝑚 for 𝐴 = Tl, [12] respectively. In the present study, we focus on TlFeSe 2 because it is the only one among these 𝐴FeSe 2 compounds that has been reported to adopt the layered tetragonal structure [13] in addition to the stable monoclinic structure.…”

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confidence: 99%

Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe₂*

Liu¹,

Dong²,

Shan³

et al. 2020

Chinese Phys. Lett.

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We report a comprehensive high-pressure study on the monoclinic TlFeSe2 single crystal, which is an antiferromagnetic insulator with quasi-one-dimensional crystal structure at ambient pressure. It is found that TlFeSe2 undergoes a pressure-induced structural transformation from the monoclinic phase to an orthorhombic structure above P c ≈ 13 GPa, accompanied with a large volume collapse of ΔV/V 0 = 8.3%. In the low-pressure monoclinic phase, the insulating state is easily metallized at pressures above 2 GPa; while possible superconductivity with T c onset ∼ 2 K is found to emerge above 30 GPa in the high-pressure phase. Such a great tunability of TlFeSe2 under pressure indicates that the ternary AFeSe2 system (A = Tl, K, Cs, Rb) should be taken as an important platform for explorations of interesting phenomena such as insulator-metal transition, dimensionality crossover, and superconductivity.

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“…In this context, the ternary metal chalcogenides AFeX 2 (A=alkali metal, Tl; X=S,Se) are interesting materials because they host linear spin chains formed by edgesharing 1 ∞ [FeX 4/2 ] − tetrahedra along the chain axis, as shown in Fig. 1 (a) [12][13][14] . As previously reported, KFeS 2 , RbFeS 2 , KFeSe 2 , and RbFeSe 2 crystallize in the monoclinic space group C/2c, while TlFeS 2 and TlFeSe 2 crystallize in the monoclinic space group C/2m [15][16][17] .…”

Section: Introductionmentioning

confidence: 99%

Spin dynamics of the spin chain antiferromagnet RbFeS$_2$

Li,

Zheng,

Frandsen

et al. 2021

Preprint

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We report transport and inelastic neutron scattering studies on electronic properties and spin dynamics of the quasi-one-dimensional spin chain antiferromagnet RbFeS2. An antiferromagnetic phase transition at TN ≈ 195 K and dispersive spin waves with a spin gap of 5 meV are observed. By modeling the spin excitation spectra using linear spin wave theory, intra and inter-chain exchange interactions are found to be SJ1 = 100(5) meV and SJ3 = 0.9(3) meV, respectively, together with a small single-ion anisotropy of SDzz = 0.04(1) meV. Comparison with previous results for other materials in the same class of Fe 3+ spin chain systems reveals that although the magnetic order sizes show significant variation from 1.8 to 3.0µB within the family of materials, the exchange interactions SJ are nevertheless quite similar, analogous to the iron pnictide superconductors where both localized and delocalized electrons contribute to the spin dynamics.

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Magnetic structure of TlFeS2 and TlFeSe2 chalcogenides

Cited by 16 publications

References 14 publications

Incommensurate magnetism in K2MnS2−xSex and prospects for tunable frustration in a triangular lattice of pseudo-1D spin chains

Incommensurate magnetism in K2MnS2−xSex and prospects for tunable frustration in a triangular lattice of pseudo-1D spin chains

Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe₂*

Spin dynamics of the spin chain antiferromagnet RbFeS$_2$

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Magnetic structure of TlFeS2 and TlFeSe2 chalcogenides

Cited by 16 publications

References 14 publications

Incommensurate magnetism in K2MnS2−xSex and prospects for tunable frustration in a triangular lattice of pseudo-1D spin chains

Incommensurate magnetism in K2MnS2−xSex and prospects for tunable frustration in a triangular lattice of pseudo-1D spin chains

Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe2*

Spin dynamics of the spin chain antiferromagnet RbFeS$_2$

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Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe₂*