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J Phys Condens Matter. 2012 Jan 25;24(3):036001. doi: 10.1088/0953-8984/24/3/036001. Epub 2011 Dec 9.

Incommensurate magnetic order in TbTe3.

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1
Laboratory for Solid State Physics, ETH Zürich, Zürich, Switzerland.

Abstract

We report a neutron diffraction study of the magnetic phase transitions in the charge-density wave (CDW) TbTe(3) 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 TbTe(3) at T(mag1) = 5.78 K as a result of continuous phase transitions. We observe that near the temperature T(mag1) 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 TbTe(3). This suggests that correlations leading to the long-range magnetic order in TbTe(3) are linked to the modulations that occur in the CDW state.

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