Magnetic properties of TlFe2−xSe2

Häggström, Lennart; Verma, H.R.; Bjarman, S.; Wäppling, R.; Berger, Rolf

doi:10.1016/0022-4596(86)90197-0

Cited by 42 publications

(68 citation statements)

References 9 publications

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“…The latter suggests Fe vacancy in the FeSe plane since two different kinds of Fe vacancy orders have been reported previously in chalcogenide TlFe 2−x S 2 and TlFe 2−x P 2 [18,19].…”

Section: Sample Composition and Crystal Structure Of The Superconductorssupporting

confidence: 65%

Structure, magnetic order and excitations in the 245 family of Fe-based superconductors

Bao

2014

J. Phys.: Condens. Matter

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Elastic neutron scattering simultaneously probes both the crystal structure and magnetic order in a material. Inelastic neutron scattering measures phonons and magnetic excitations. Here we review the average composition, crystal structure and magnetic order in the 245 family of Fe-based superconductors and in related insulating compounds from neutron diffraction works. A threedimensional phase-diagram summarizes various structural, magnetic and electronic properties as a function of the sample composition. High pressure phase diagram for the superconductor is also provided. Magnetic excitations and the theoretic Heisenberg Hamiltonian are provided for the superconductor. Issues for future works are discussed.

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“…The latter suggests Fe vacancy in the FeSe plane since two different kinds of Fe vacancy orders have been reported previously in chalcogenide TlFe 2−x S 2 and TlFe 2−x P 2 [18,19].…”

Section: Sample Composition and Crystal Structure Of The Superconductorssupporting

confidence: 65%

Structure, magnetic order and excitations in the 245 family of Fe-based superconductors

Bao

2014

J. Phys.: Condens. Matter

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“…This was not unexpected, since it has previously been found that the magnetic moments of TlFe 2−x Se 2 ͑x = 0.3-0.4͒ lie along the c axis. 5,6 Figures 1 and 2, as well as 3 and 4, all show that the susceptibility is markedly higher for the orientation of the field parallel to the c axis. Thus, there is a strong indication that there is a net moment along the c axis.…”

Section: Discussionmentioning

confidence: 86%

“…2 and 3͒ and TlCo 2 S 2 , 4 or parallel to it, as for TlFe 2−x Se 2 x = 0.3-0.4, with and without vacancy ordering. 5,6 Studying crystals instead of powder samples also decreases the amount of oxide impurities, and hence increases the accuracy of the measurements.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of TlCu2−xFexSe2 crystals

Felton

Nordblad

Ronneteg

et al. 2005

Journal of Applied Physics

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The magnetic properties of two compositions of random solutions in the TlCu 2−x Fe x Se 2 system with x = 0.2 and 0.45 have been investigated by superconducting quantum interference device magnetometry. The crystal structure is of a layer type and ordering due to the iron atoms occurs at low temperatures, with T c = 85 K for x = 0.2 and T c = 130 K for x = 0.45. The samples were highly textured crystals and the magnetic moments of both compositions were found to align along the c axis of the structure. The saturation moments were found to be 1.5 B / Fe for x = 0.2 and 0.66 B /Fe for x = 0.45.

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“…The vacancies form a superlattice as suggested in early work and in the recent transmission electron microscopy on KFe x Se 2 for 1.5 ≤ x ≤ 1.6. [11,12] The two possip-1 ble super-lattice structures are illustrated in Fig. 1, which may be stabilized by the Coulomb repulsion of the Fe-ions.…”

mentioning

confidence: 99%

Theory for superconductivity in (Tl,K)Fe _x Se ₂ as a doped Mott insulator

Zhou

Zhang

et al. 2011

EPL

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Possible superconductivity in the recently discovered (Tl,K)FexSe2 compounds is studied from the viewpoint of doped Mott insulator. The Mott insulating phase is examined to be preferred in the parent compound at x = 1.5 due to the presence of Fe-vacancies. Partial filling of vacancies at the Fe-sites introduces electron carriers and leads to electron-doped superconductivity. By using a two-orbital Hubbard model in the strong-coupling limit, we find that the s-wave pairing is more favorable at small Hund's coupling, and d x 2 −y 2 -wave pairing is more favorable at large Hund's coupling.

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Magnetic properties of TlFe2−xSe2

Cited by 42 publications

References 9 publications

Structure, magnetic order and excitations in the 245 family of Fe-based superconductors

Structure, magnetic order and excitations in the 245 family of Fe-based superconductors

Magnetic properties of TlCu2−xFexSe2 crystals

Theory for superconductivity in (Tl,K)Fe _x Se ₂ as a doped Mott insulator

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Magnetic properties of TlFe2−xSe2

Cited by 42 publications

References 9 publications

Structure, magnetic order and excitations in the 245 family of Fe-based superconductors

Structure, magnetic order and excitations in the 245 family of Fe-based superconductors

Magnetic properties of TlCu2−xFexSe2 crystals

Theory for superconductivity in (Tl,K)Fe x Se 2 as a doped Mott insulator

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Product

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Theory for superconductivity in (Tl,K)Fe _x Se ₂ as a doped Mott insulator