"Incommensurate magnetic order in TbTe3"

Pfuner, F.: Gvasaliya, S. N., Zaharko, O., Keller, L., Mesot, J., Pomjakushin, V., Chu, J. H., Fisher, I. R., Degiorgi, L.; Journal of Physics: Condensed Matter, 12/09/11.

Additional Authors: Gvasaliya, S. N., Zaharko, O., Keller, L., Mesot, J., Pomjakushin, V., Chu, J. H., Fisher, I. R., Degiorgi, L.

Abstract:

We report a neutron diffraction study of the magnetic phase transitions in the charge-density wave (CDW) TbTe3 compound. We discover that in the paramagnetic phase there are strong 2D-like magnetic correlations, consistent with the pronounced anisotropy of the chemical structure. A long-range incommensurate magnetic order emerges in TbTe3 at Tmag1 = 5.78 K as a result of continuous phase transitions. We observe that near the temperature Tmag1 the magnetic Bragg peaks appear around the position (0, 0, 0.24) (or its rational multiples), that is fairly close to the propagation vector (0,0,0.29) associated with the CDW phase transition in TbTe3. This suggests that correlations leading to the long-range magnetic order in TbTe3 are linked to the modulations that occur in the CDW state.