Abstract

We investigated the transport and magnetic properties of (RES)xMS2 (RE = rare earth metal, M = Ta, V) with an incommensurate layered structure to elucidate the effect of the incommensurability. Electrical conduction is mostly governed by the carriers on the MS2 layers while the RES layer seems to be insulating. The electron localization on the RES layer is caused by the lattice incommensuration. Antiferromagnetic transitions occur at 2.03, 4.1 and 1.7 K for M = Ta and RE = Cc, Gd and Dy, and at 5.45 and 5.0 K for M = V and RE = Ce and Gd, respectively. Quasi-two-dimensional magnetism is ascertained is asc Ising magnet (CeS)xMS2 by heat capacity and susceptibility measurements.

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