Abstract
Here, we report the synthesis and magnetic properties of a novel, centrosymmetric, quasi-1D spin chain system La3VWS3O6, with hexagonal crystal structure (P63/m, a = 9.460 76(3), c = 5.518 09(2) Å). Pure powders were obtained by solid-state reactions from La2O3, WO3 and metal powders of V and W. X-ray powder diffraction, specific heat, magnetization, 139La-nuclear magnetic resonance (NMR), and electric resistivity measurements indicate that the compound is a low dimensional magnet with an S = 1 spin chain that exhibits no sign of magnetic ordering above 2 K. A single ion anisotropy (D/kB ~ 10 K), caused by magneto-crystalline effects, is probably responsible for a thermodynamic entropy release at lower temperatures, which concurs with 139La-NMR data. By detailed comparison with non-centrosymmetric Ba3V2S4O3, having a very similar magnetic lattice, it is obvious that the presence of crystallographic inversion symmetry has an effect on the behaviour of the magnetic chains.
Highlights
Quasi-one-dimensional (1D) magnetic systems exhibit complex excitation spectra, which are far from being completely understood [1]
Here, we report the synthesis and magnetic properties of a novel, centrosymmetric, quasi-1D spin chain system La3VWS3O6, with hexagonal crystal structure (P63/m, a = 9.460 76(3), c = 5.518 09(2) Å)
X-ray powder diffraction, specific heat, magnetization, 139La-nuclear magnetic resonance (NMR), and electric resistivity measurements indicate that the compound is a low dimensional magnet with an S = 1 spin chain that exhibits no sign of magnetic ordering above 2 K
Summary
Quasi-one-dimensional (1D) magnetic systems exhibit complex excitation spectra, which are far from being completely understood [1]. 1D materials always were an active research topic because of their unique properties and potential electrical applications [2,3,4]. 1D chains with non-classical spin, such as S = 1⁄2 and S = 1, have gained considerable attention due to their relatively simple descriptions. 1D system containing S = 1⁄2 chains without spin-excitations (gapless) are often referred to as Luttinger liquids, featuring a spin-charge separation [5, 6].
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