Resistance, magnetic susceptibility in (T, Nb)Nb2Se10 with t = Fe, Cr

H. Gruber , W. Sitte , H. Sassik

Fe1+xNb3-xSe10 with x = 0.32, 0.38 and Cr1.45Nb2.55Se10 were prepared by heating in evacuated silica tubes. The structure was determined by Weissenberg photograph. The metal-insulator transition of Fe1+xNb3-xSe 10 and of Cr1.45Nb2.55Se10 was studied by measurements of resistivity, and magnetic susceptibility. The metal-insulator transition is correlated with the CDW which depresses the conductivity in the NbSe3-chains and gives an Anderson type metal-insulator transition. The metal-insulator transition of Fe1+ xNb3-xSe 10 appears at 140 K and increases to 190 K for Cr1.45Nb 2.55Se10.

Mots clés: Anderson model; charge density waves; chromium compounds; crystal atomic structure of inorganic compounds; iron compounds; magnetic susceptibility; metal insulator transition; niobium compounds; one dimensional conductivity; paramagnetic properties of substances

Domaines: Articles anciens

H. Gruber, W. Sitte, H. Sassik. Resistance, magnetic susceptibility in (T, Nb)Nb2Se10 with t = Fe, Cr. Journal de Physique, 1984, 45 (7), pp.1231-1236. ⟨10.1051/jphys:019840045070123100⟩. ⟨jpa-00209859⟩