Spin reorientation in TlFe1.6Se2 with complete vacancy ordering

Abstract

The relationship between vacancy ordering and magnetism in TlFe1.6Se2 has been investigated via single crystal neutron diffraction, nuclear forward scattering, and transmission electron microscopy. The examination of chemically and structurally homogenous crystals allows the true ground state to be revealed, which is characterized by Fe moments lying in the ab-plane below 100K. This is in sharp contrast to crystals containing regions of order and disorder, where a competition between c-axis and ab-plane orientations of the moments is observed. The properties of partially-disordered TlFe1.6Se2 are therefore not associated with solely the ordered or disordered regions. This contrasts the viewpoint that phase separation results in independent physical properties in intercalated iron selenides, suggesting a coupling between ordered and disordered regions may play an important role in the superconducting analogues.

Minor changes; updated references and funding acknowledgement

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• Tuning Magnetic Order in the van der Waals Metal Fe5GeTe2 by Cobalt Substitution
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• Nonlinear spin Hall effect in $\mathcal{P}\mathcal{T}$-symmetric collinear magnets
• Evolution of precipitate morphology during heat treatment and its implications for the superconductivity in KxFe1.6+ySe2 single crystals
• Analysis of model parameter dependences on the second-order nonlinear conductivity in $\mathcal{P}\mathcal{T}$-symmetric collinear antiferromagnetic metals with magnetic toroidal moment on zigzag chains
• Optical conductivity of iron-based superconductors
• Electric double-layer transistor using layered iron selenide Mott insulator TlFe1.6Se2
• Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals
• Anomalous metallic state and anisotropic multiband superconductivity in Nb3Pd0.7Se7
• Evidence for Defect-induced Superconductivity up to 49 K in (Ca1-xRx)Fe2As2
• Ferroaxial moment induced by vortex spin texture
• Intertwined magnetic and nematic orders in semiconducting KFe${}_{0.8}$Ag${}_{1.2}$Te${}_2$
• Neutron Scattering Study on Spin Dynamics in Superconducting (Tl,Rb)2Fe4Se5
• Evolution of superconductivity in isovalent Te-substituted KxFe2-ySe2 crystals
• Exploration of iron-chalcogenide superconductors
• Pressure-induced magnetic collapse and metallization of $\mathrm{TlF}{\mathrm{e}}_{1.6}\mathrm{S}{\mathrm{e}}_2$