N V Baranov et al 2009 J. Phys.: Condens. Matter 21 506002 doi:10.1088/0953-8984/21/50/506002
N V Baranov1,2, V G Pleshchev2, N V Selezneva2, E M Sherokalova2, A V Korolev1, V A Kazantsev1 and A V Proshkin1,2
Show affiliationsCrystal structure investigations, electrical resistivity, and magnetic measurements have been performed for polycrystalline samples of intercalated compounds CrxTiTe2 with a Cr concentration up to x = 0.65. According to the room-temperature x-ray diffraction study of CrxTiTe2, the initial hexagonal crystal structure transforms to a monoclinic one with increasing Cr content up to x≥0.5 due to the ordering of Cr ions. The intercalation results in the change of the resistivity behavior in CrxTiTe2 from metal-like at x = 0 to insulator-like above x = 0.33 and leads to ferromagnetic ordering of Cr magnetic moments at x≥0.5. For the compound Cr0.25TiTe2, structural transformations and anomalous resistivity behavior are observed around 230 K, which cannot be explained only by the order–disorder transition within the subsystem of intercalated Cr ions. Structural changes within Te–Ti–Te sandwiches associated with charge density wave instability are suggested to be involved in this phase transition as well.
72.60.+g Mixed conductivity and conductivity transitions
71.30.+h Metal-insulator transitions and other electronic transitions
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
75.30.Cr Saturation moments and magnetic susceptibilities
Issue 50 (16 December 2009)
Received 21 September 2009, in final form 22 October 2009
Published 23 November 2009
N V Baranov et al 2009 J. Phys.: Condens. Matter 21 506002
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